chem 24 Flashcards
(347 cards)
1
Q
(CH3)2CHOH is the chemical formula for which specific alcohol?
A
Isopropyl alcohol or 2 propanol
2
Q
According to Avogadro’s law what is the volume of 1 mole of any gas at standard temperature and pressure?
A
22.4dm3
3
Q
C2H6O is the molecular formula for which alcohol?
A
Ethanol
4
Q
Does the electrostatic potential energy of a system of two charges increase, decrease or remain the same as the distance between them increases?
A
Increase
5
Q
Does the electrostatic potential of a system of two charges increase decrease or remain the same as the distance between them increases?
A
It increases
6
Q
How many isomers does the hydrocarbon with the formula C4H10 have?
A
2
7
Q
How many valence electrons do elements in group 18 of the periodic table have?
A
8
8
Q
In degrees Celsius to 1 decimal place what is the transitional temperature between rhombic Sulphur and monoclinic Sulphur?
A
95.6℃
9
Q
In the electrolysis of aqueous sodium chloride which gas is produced at the cathode?
A
Hydrogen
10
Q
Is the quantity of electricity required to liberate 10g of cupper from a cupper compound Closer to 25
A
0
11
Q
Name any one of the two elements that was first discovered by Louis Nicolas Vauquelin?
A
Chromium or Beryllium
12
Q
potassium hydrogen phthalate often simply called KHP is an acidic compound what is its chemical formula?
A
C₈H₅KO₄
13
Q
Small quantities of which gas can be safely tested in the so-called squeaky pop Experiment?
A
Hydrogen
14
Q
Sodium chloride silver chloride potassium chloride or magnesium chloride which of these is an insoluble salt?
A
Silver chloride
15
Q
Specifically, state what is produced when copper sulphate pentahydrate is heated?
A
Anhydrous Copper Sulphate or salt
16
Q
To have an octet oxygen must gain how many electrons?
A
2
17
Q
To the nearest whole number what is the molar mass of Iron?
A
56 g/mol
18
Q
Using Methyl orange as an indicator What is produced in the titration of sodium carbonate and Hydrochloric acid?
A
Sodium chloride, water and carbon dioxide
19
Q
What are the final products in the electrolysis of cupper sulphate using Inert electrodes?
A
Cupper metal and Oxygen gas
20
Q
What are the products which results from electrolysis of cupper sulphate solution using inert electrodes?
A
Cupper and oxygen
21
Q
What are the two main elements in the alloy electrum? Gold and silver
A
22
Q
What colour does the indicator methyl orange turn in a basic solution? Yellow
A
23
Q
What compound is largely responsible for the foul odour of rancid butter? Butanoic acid
A
24
Q
What inorganic compound has the formula CaSO4? Calcium sulphate
A
25
What is another name for a reducing agent which is a chemical species that loses electrons and is oxidised in a chemical reaction? Reductant
reducer or electron donor
26
What is produced when aqueous? Cupper (II) Ion reacts with aqueous iodide ion? Solid Cupper (I) Iodide and aqueous iodide
27
What is produced when magnesium reacts with Hydrochloric acid? Magnesium chloride and hydrogen
28
What is the atomic number of Chlorine? 17
29
What is the best method to separate an aqueous mixture of cupper (II) Oxide and Cupper (II) sulphate? Filtration
30
What is the chemical formula for acetic acid? CH3COOH
31
What is the chemical formula for Adipic acid? C₆H₁₀O₄
32
What is the chemical formula for barium Sulphate? BaSO4
33
What is the chemical formula for potassium perchlorate? KClO4
34
What is the chemical formula for Stibnite? Sb2S3
35
What is the chemical formula for zinc phosphate? Zn3(PO4)2
36
What is the chemical formula of potassium persulfate? K2S2O8
37
What is the collective name for the elements with atomic numbers from 57 to 71 on the periodic table? Lanthanides
38
What is the descriptive term used for a very large molecule having a polymeric chain structure? Macromolecule
39
What is the formula for Chromic Oxide? Cr2O3
40
What is the formula for iron (III) Chloride? FeCl3
41
What is the formula for lead (ii) Sulphide? PbS
42
What is the formula for Lithium Nitride? Li3N
43
What is the formula for the acetate anion? C2H3O2-
44
What is the formula for the alkane tetradecane? C14H30
45
What is the formula for the dehydrant phosphate ion? H2PO4-
46
What is the formula for the dichromate anion? Cr2O72-
47
What is the formula for the mercurous ion? Hg22+
48
What is the full and complete name for a compound whose molecule has the same number of atoms of each element but with logically distinct bonds between them? Structural isomer
49
What is the full chemical name for glauber's salt? sodium sulfate Decahydrate
50
What is the full name of the principle based on the fact that the unknown concentration of the known solution can be determined by titrating it with a known volume of another solution with known concentration? Volumetric Analysis
51
What is the general formula for the homologous series which has a compound with the formula C3H8? CnH2n+2
52
What is the general name given to a type of paper that changes colour according to the acidity of a solution in which it is dipped? PH Paper
53
What is the molecular mass of ethanol to the nearest whole number? 46 g/mol
54
What is the name and symbol for the element in group 16 of the periodic table with the atomic number 34? Selenium
Se
55
What is the name for a chemical reaction in which energy is absorbed? Endothermic Reaction
56
What is the name for a series of compounds with similar chemical properties and some functional groups differing from the successive member by CH2? Homologous Series
57
What is the name for a substance that produces two hydrogen ions per molecule of acid when it gets completely dissociated in water? Dibasic acid or diprotic acid
58
What is the name for the change in the amount of a reactant or product per unit time? Rate of reaction
59
What is the name for the colourless flammable toxic liquid with an ammonia like odour and chemical formula N2H4? Hydrazine
60
What is the name for the form of polymerization where smaller molecules or monomers react with each other to form a larger structural unit while releasing by products such as water or methanol? Condensation
61
What is the name for the method of separating molecules having different densities by spinning them in solution around an axis at high speed? Centrifugation
62
What is the name for the organic molecule comprising two benzene rings fused together and has the Chemical formula C10H8? Naphthalene
63
What is the name of the chemical bond formed when two atoms share two electrons? Covalent bond
64
What is the name of the most radioactive element known to man? Oganesson
65
What is the number of shared electrons pair in the methane molecule? 4
66
What is the oxidation state of cupper in cupper iodide? +1
67
What is the specific name for the process that involves repeated condensation reactions between two different bifunctional or trifunctional monomers? Condensation polymerization
68
What kind of bond is found in hydrogen and nitrogen gas molecules? Covalent bonds
69
When calcium Nitrate is heated it decomposes to which 3 substances? Calcium oxide
Nitrogen dioxide and oxygen
70
Which allotrope of carbon has a boiling point of 4
200°C? Graphite
71
Which Law states that the rate at which a body loses its heat to its surroundings is proportional to the excess of mean temperature of the body over that of the surroundings? Newton law of cooling
72
Which of the following compounds is soluble on cold water
Lead chloride
73
Which of the following oxides is amphoteric Lead (II) Oxide
Sodium Oxide
74
Which organic compound has the formula C5H12? Pentane
75
Whose Law states that a solvents partial vapour pressure in a solution is equal or identical to the vapour pressure of the pure solvent multiplied by its mole fraction in the solution? Raoult's law
76
With the formula (C2H4)N this is the most commonly used plastic what is its scientific name? Polythene or polyethylene
77
CH3COOH is the formula for which substance? Ethanoic acid
78
AlF3 is the formula for what chemical formula? Aluminium fluoride
79
All combustion reactions require a specific chemical as a reactant
name it? Oxygen
80
C3H8 is the molecular formula of which alkane? Propane
81
CaH2 is the formula for what chemical compound? Calcium Hydride
82
CnH2n-2 is the general formula for which group of organic compounds? Alkyne
83
Describe what will be observed When sodium or potassium hydroxide is added in excess to a solution of a cupper salt? A Greenish blue precipitation of Cupper hydroxide
84
Feldspar is an ore of which element? Aluminum
85
H3PO4 is the formula for which compound? Phosphoric acid
86
How many carbon atoms does butane have? 4
87
How many neutrons are in the element gadolinium? 93
88
How many neutrons are in the element scandium? 24
89
How many protons are in the element strontium? 38
90
Hydrogen peroxide contains both polar and non-polar covalent bonds is this statement true or false? True
91
In chemistry what is a substance obtained by the reaction of an acid and a base called? Salt
92
In what group is the element lithium on the periodic table? 1
93
In what group is the element scandium on the periodic table? Group 3
94
In which group of the periodic table are the alkali earth metals found? Group 2
95
In which group of the periodic table is the element cobalt? 9
96
In which group of the periodic table is the element titanium? Group 4 or 4B
97
In which group of the periodic table is the element with atomic number 26? Group 8
98
In which group of the periodic table is the element with atomic number 31? Group 13
99
In which group of the periodic table is the element with the atomic number 20 found? Group 2
100
Nickel was first identified and isolated as an element by which Swedish Chemist? Axel Cronstedt
101
RCONH2 is the general formula for which group of compounds? Amide
102
Rock salt is an ore of which element? Sodium
103
The atomic mass is expressed in what units? AMU
104
The element oxygen is found in what 3 naturally occurring stable isotopes? 18O
17O
105
The German chemist August Kekulé is known for the of what chemical? Benzene
106
The German-Dutch chemist Johann Rudolf Glauber was the first to discover the production of which chemical compound? Potassium permanganate
107
The presence of what element is the main difference between organic and inorganic acids? Carbon
108
Titanium was first identified by which English chemist? William Gregor
109
To the nearest whole number what is the molar mass of lithium oxide? 30g/mol
110
Using the universal indicator what colour is the PH range 1-3? Red
111
Using the universal indicator what colour is the PH range 8-11? Blue
112
What are the products of a combustion of a hydrocarbon? Carbon dioxide and water
113
What are the two stable isotopes of carbon? Carbon 12 and 13
114
What compound consists of 3 carbon atoms 6 hydrogen atoms and 1 oxygen atom? Acetone
115
What do we call the longest side of a right-angled triangle? Hypotenuse
116
What element is naturally found in the earth’s crust in the ores of Valentinite and stibnite? Antimony
117
What is formed when Barium iodide reacts with sodium sulphate? Barium sulphate and sodium iodide
118
What is formed when potassium oxide reacts with hydrogen chloride? Potassium chloride and water
119
What is formed when potassium oxide reacts with water? Potassium hydroxide
120
What is the 3rd of the F block elements? Uranium
121
What is the atomic mass of the element sodium to the nearest whole number? 23
122
What is the atomic mass of the element sulphur to the nearest whole number? 32
123
What is the atomic number of the element with the symbol Au? 79
124
What is the atomic number of the element with the symbol Cu? 29
125
What is the chemical formula for Boric acid? H3BO3
126
What is the chemical formula for boric acid? H3BO3
127
What is the chemical formula for carbon tetraiodide? CI4
128
What is the chemical formula for cobalt (II) Chloride? CoCl2
129
What is the chemical formula for Cuprous Nitrate? Cu(NO3)2
130
What is the chemical formula for ethane? C2H6
131
What is the chemical formula for gold (I) Nitride? Au3N
132
What is the chemical formula for oxalic acid? C2H2O4
133
What is the chemical formula for phenyl? C6H5
134
What is the chemical formula for the compound toluene? C7H8
135
What is the chemical formula for the substance known as Condy's crystals? KMnO4
136
What is the formula for barium iodide? BaI2
137
What is the formula for carbon tetrafluoride? CF4
138
What is the formula for carbon trioxide CO3
139
What is the formula for selenide ion? Se2-
140
What is the formula for the arsenide ion? As3-
141
What is the formula for the chemical compound Xenon difluoride? XeF2
142
What is the formula for the chromate ion? CrO42-
143
What is the formula for zinc Bicarbonate? Zn(HCO3)2
144
What is the formula for zinc chloride? ZnCl2
145
What is the general formula for alkenes? CnH2n
146
What is the last of the F block elements? Lawrencium
147
What is the maximum number of electrons that can be accommodated in the 3rd shell of an atom? 18
148
What is the maximum number of electrons that can be accommodated with in the 5th shell of an atom? 50
149
What is the molar mass of calcium carbonate? 100g/mol
150
What is the name for a reaction in which an atom or ion in a compound is replaced by an atom or an ion of another element? Displacement reaction
151
What is the name for reactions involving simultaneous reduction and oxidation of atoms which converts to two compounds
one of higher and one of lower oxidation states? Disproportionation reaction
152
What is the name of the electrode in an electro…
153
What is the name of the phenomenon in which two compounds have the same chemical formula but different Chemical structures? Isomerism
154
What is the only metal on the periodic table that exist in is liquid state at room temperature? Mercury (Hg)
155
What is the only naturally occurring radioactive Nobel gas? Radon
156
What is the pale greenish yellow solid with the formula PCl5 called? Phosphorus pentachloride
157
What is the scientific name for the substance known as Condy's crystals? Potassium permanganate
158
What is the symbol for the chemical element tungsten? W
159
What is the symbol for the chemical element Yttrium? Y
160
What is the symbol of the sixth element in group 2 of the periodic table? Ra
161
What is the valency of beryllium? 2
162
What is the valency of the element aluminium in aluminium phosphate? 3
163
What is the valency of the element chlorine? 1
164
What is the valency of the element fluorine in calcium fluride? 1
165
What is the valency of the element terbium? 2
166
What is the valency of Titanium? 4
167
What is the valency…?
168
What name is given to the binding capacity of an atom measured by the number of hydrogen atoms that it combines with? Valency
169
What substance is used for the cathode in lead acid automobile batteries? Lead dioxide
170
What term is used to describe a type of reaction in which energy is released in the form of heat? Exothermic
171
What was the first element that was made artificially? Technetium
172
When hydrochloric acid reacts with sodium hydroxide what is produced? NaCl and H2O (Sodium Chloride and water)
173
When iron is added to cupper sulphate solution what does it displace? Cupper metal
174
Which artist recorded the song ocean eyes in 2016? Billie Eilish
175
Which French chemist stated that the proportion of elements by weight in a compound will always remain exactly the same? Joseph Proust
176
Which halogen is a liquid at room temperature? Bromine
177
Which halogen is radioactive? Astatine
178
Which law states that if two elements combine to form more than one compound the masses of 1 element that combine with a fixed mass of the other are in the ratio of small whole numbers.? Law of multiple proportions
179
Which organic liquid has the chemical formula C2H6OS? Dimethyl sulfoxide
180
Which scientist discovered Chlorine and manganese? Carl Wilhelm Scheele
181
Which scientist discovered the element
Nickel? Axel Fredrik Cronstedt
182
Which specific type of bond is found between two atoms which share a single pair of electrons? A single covalent bond
183
Which theory in chemistry states that a chemical reaction can only occur between particles when they hit each other? Collision theory
184
Which theory in chemistry states that as two reactants come together the potential energy increases and reaches a maximum? Transition state theory
185
Who discovered the chemical element with the symbol Cl? Carl Scheele
186
Who discovered the element with the symbol Li? Johan Arfwedson
187
Who discovered the Nobel gasses? William Ramsey
188
What is the formula for the compound strontium sulphate? SrSO4
189
What is the formula for the compound Zinc Carbonate? ZnCO3
190
All the elements of group 13 of the periodic table posses how many electrons in their valence shell? 3
191
Alloys of which metal can be made as strong as steel but half as much in weight? Titanium
192
Elements in which group of the periodic table are also known as chalcogens? Group 16
193
How many carbon atoms does Benzoic acid have? 7
194
How many carbon atoms does Pyridine have? 5
195
How many electrons are there in the valence shell of a carbon atom? 4
196
How many electrons are there in the valency shell of an oxygen atom? 6
197
How many periods or rows are there on the periodic table? 7
198
How many valence electrons are in a phosphorus atom? 5
199
Hydrogen chloride ionizes in water to give what cation? Hydrogen
200
In which group of the periodic table is the element bismuth? Group 15
201
In which group of the periodic table is the element lead? Group 14
202
On which block of the periodic table can you find the element copper? D block
203
Sodium hydroxide disassociates in water to give what diatomic anion? Hydroxide (OH-)
204
The addition of which element is mainly responsible for imparting the stainless property to steel? Chromium
205
The rows on the periodic table are arranged so that Non-metals are on which side? Right
206
To the nearest whole number what is the relative atomic mass of Sodium carbonate? 106g/mol
207
To the nearest whole number what is the relative atomic mass of sodium hydroxide? 40 g/mol
208
To what group in the periodic table does chlorine belong? 17
209
To what group in the periodic table does silicon belong? 14
210
To which group of the periodic table does the element boron belong? 13
211
To which group of the periodic table does the element cobalt belong? 9
212
To which group of the periodic table does the element with the atomic number 75 belong? Group 7
213
Wha is the formula for Caesium monoxide? Cs2O
214
What Chemical compound has the chemical formula C3H6O2? Propanoic acid or ethyl acetate
215
What chemical compound has the formula C6H5COOH? Benzoic acid
216
What chemical element has an atomic number of 36? Krypton
217
What chemical element has an atomic number of 44? Ruthenium
218
What chemical element has an atomic number of 46? Palladium
219
What chemical element has the atomic mass 12.011? Carbon
220
What chemical element has the atomic mass 55.85? Iron
221
What chemical element has the atomic number 102 and symbol No? Nobelium
222
What chemical element has the atomic number 77 and symbol Ir? Iridium
223
What element has the atomic number 30? Zinc
224
What element in the periodic table has the highest electrical conductivity? Silver
225
What is another name for fruit sugar? Fructose
226
What is the atomic number for the element with atomic number Po? 84
227
What is the boiling point of water in degrees Fahrenheit? 212°F
228
What is the boiling point of water on the Fahrenheit scale? 212°F
229
What is the chemical formula for boric acid? H3BO3
230
What is the chemical formula for butanoic acid? C3H7COOH or C4H8O2
231
What is the chemical formula for carbolic acid? C6H5OH
232
What is the chemical formula for cyano methane? C2H3N or CH3CN
233
What is the chemical formula for dimethyl sulphide? C2H6S
234
What is the chemical formula for Dinitrogen Pentoxide? N2O5
235
What is the chemical formula for gold oxide? Au2O3
236
What is the chemical formula for lithium iodide? LiI
237
What is the chemical formula for maltose? C12H22O11
238
What is the chemical formula for oxalic acid? C2H2O4
239
What is the chemical formula for platinum oxide? PtO2
240
What is the chemical formula for potassium chlorate? KClO3
241
What is the chemical formula for sodium bisulphite? NaHSO3
242
What is the chemical formula for sodium nitrite? NaNO2
243
What is the chemical formula for tartaric acid? C4H6O6
244
What is the chemical formula for toluene? C6H5CH3
245
What is the chemical formula of dimethyl sulfoxide? C2H6OS
246
What is the chemical formula of sulphur tetrafluoride? SF4
247
What is the chemical symbol for the element with atomic number 92? U
248
What is the colour of calcium chloride compound? White
249
What is the colour of pure iron? Silvery grey
250
What is the formula for Nitric acid? HNO3
251
What is the formula for sulphuric acid? H2SO4
252
What is the formula for the carbide ion? C4-
253
What Is the formula for the chemical compound hydrazine? N2H4
254
What is the formula for the chemical compound titanium dioxide? TiO2
255
What is the formula for the compound magnesium carbonate? Mg CO3
256
What is the formula for the compound methyl-ethyl ketone? C4H8O
257
What is the formula for the ferric ion? Fe3+
258
What is the formula for the Helium Hydride ion? HeH+
259
What is the formula for the Plumbous ion? Pb2+
260
What is the formula for the Strontium ion? Sr2+
261
What is the formula for Tungsten Oxide? WO3
262
What is the freezing point of water in degrees Fahrenheit? 32°F
263
What is the general formula for alkenes? CnH2n
264
What is the highest atomic number of elements which are actinides? 103
265
What is the IUPAC name of Ammonia? Azane
266
What is the last element in group 5 of the periodic table that does not occur naturally? Dubnium
267
What is the least electronegative element on the periodic table? Cesium
268
What is the molar mass of hydrogen sulphide to the nearest whole number? 34g/mol
269
What is the molar mass of potassium hydroxide to the nearest whole number? 56 g/mol
270
What is the molar mass of potassium hydroxide to the nearest whole number? 56 g/mol
271
What is the molar mass of sodium fluoride to the nearest whole number? 42 g/mol
272
What is the molecular formula for nonane? C9H20
273
What is the molecular formula for Undecane? C11H24
274
What is the most abundant alkaline earth metal? Calcium
275
What is the most common alkali metal? Sodium
276
What is the most common colour that you can see in pure carbon? Grey black
277
What is the most elector negative element in the periodic table? Fluorine
278
What is the most metallic element on the periodic table? Francium
279
What is the name for a technique where a solution of known concentrations is used to determine the concentration of an unknown solution? Titration
280
What is the name for the tendency for an atom in a molecule to attract the shared pair of electrons towards itself? Electronegativity
281
What is the name of the functional group that consists of a carbon atom double bonded to an oxygen atom? Carbonyl group
282
What is the name of the last element of the lanthanide series on the periodic table? Lutetium
283
What is the name of the number of moles of solute that is present in 1Kg or a solvent? Molarity
284
What is the scientific name for table sugar? Sucrose
285
What is the smell of the compound hydrogen sulphide? Like that of rotten eggs
286
What is the value of absolute zero in degrees Celsius? -273.15℃
287
What radioactive chemical element has the atomic number 97? Berkelium
288
What type of bond is formed by a complete transfer of valence electrons to obtain stability? Ionic
289
Which block of the periodic table can you find the element calcium? S
290
Which chemical compound has the formula Ba(OH)2? Barium Hydroxide
291
Which chemical compound has the formula Mg(OH)2? Magnesium Hydroxide
292
Which element has the atomic number 18? Argon
293
Which element on the periodic table has the atomic number of 86? Radon
294
Which famous chemist developed the Periodic Table? Dmitri Mendeleev
295
Which Law states that the pressure exerted by a gas is proportional to the temperature of the gas when the volume is a constant? Gay Lussac's Law
296
Which of the following acids is the strongest nitric
acetic or phosphoric? Nitric
297
Which of the following acids is the weakest Hydrochloric
lactic or citric? Lactic
298
Which theory states that all matter is composed of extremely small particles called atoms? Dalton’s atomic theory
299
Who developed a process in which ammonia was used obtain nitric acid? Wilhelm Ostwald
300
Who discovered the element cobalt? Georg Brandt
301
Who discovered the element hydrogen? Henry Cavendish
302
Who discovered the element with the symbol Rh? William Wollaston
303
Who is often called the first modern chemist? Robert Boyle
304
Who was the first to discover the element with the symbol V? Andrés Manuel del Rio
305
What is the chemical formula of sodium hydrogen phosphate? Na2HPO4
306
Give the full name of one of the chemists who discovered the element neon? William Ramsay or Morris Travers
307
To have an octet the element magnesium loses how many electrons? 2
308
To the nearest tenth and including the units What is the relative atomic mass of lithium? 6.9 g/mol
309
What are the group 1 elements on the periodic table called? Alkali metals
310
What are the organic compounds consisting of only carbon and hydrogen atoms called? Hydrocarbons
311
What chemical compound has the chemical formula CaCO3? Calcium carbonate
312
What element on the periodic table has 17 protons and 18 neutrons? Chlorine
313
What is defined as the property of a material by which the material is drawn to a smaller section by applying tensile stress? Ductility or ductile
314
What is the atomic number of fluorine? 9
315
What is the atomic number of the element oganesson? 118
316
What is the chemical formula for Magnesium (II) sulphate hepta hydrate? MgSO4 . 7H2O
317
What is the chemical formula for sodium phosphide? Na3P
318
What is the chemical formula for sulphur trioxide? SO3
319
What is the collective name for the elements with atomic numbers from 89 to 103 on the periodic table? Actinides
320
What is the colour of the universal indicator in a neutral solution of PH 7? Green
321
What is the colour of the universal indicator in the presence of a strong alkali with a PH greater than 11? Indego or violet
322
What is the empirical formula for the mineral known as magnetite? Fe3O4
323
What is the formula for aluminium Phosphate? AlPO4
324
What is the formula for carbon tetrabromide? CBr4
325
What is the formula for silver nitrate? AgNO3
326
What is the formula for silver permanganate? AgMnO4
327
What is the formula for the Manganate Ion? MnO42-
328
What is the formula for the stannic ion? Sn4+
329
What is the full name of the law which states that the amount of chemical change during electrolysis is directly proportional to the quantity of electrical charge cast? Faraday’s first law of electrolysis
330
What is the molecular formula for hydrogen peroxide water? H4O3
331
What is the Molecular formula for trioxidane? H203
332
What is the name and symbol for the element in group 18 of the periodic table with the atomic number 36? Krypton
Kr
333
What is the name for a bond where electrons are transferred? Ionic Bond
334
What is the name for the rarest element in group 16 of the periodic table? Polonium
335
What is the name given to elements having the same atomic number but a different mass number? Isotopes
336
What is the name given to elements having the same mass number but different atomic number? Isobars
337
What is the name of the stable Isotope of hydrogen that contains only a single neutron in the nucleus? Deuterium
338
What is the name used to refer to atoms having the same number of neutrons but different number of protons? Isotones
339
What is the only letter of the alphabet that is not used in the periodic table in chemistry? J
340
What is the oxidation number of oxygen in nitric acid? -2
341
What is the simplest of all atoms containing a single proton and a single electron? Hydrogen
342
What is the simplest of all atoms containing a single proton and a single electron? Hydrogen
343
When acidified potassium dichromate (VI) solution reacts with alcohol what is the colour change? Orange to green
344
Which element on the periodic table has 30 protons? Zinc
345
Which organic compound has the molecular formula C6H6? Benzene
346
Which Scientist discovered alpha and beta rays and first proposed the laws of radioactive decay? Ernest Rutherford
347
Which scientist first proposed the theory for the hydrogen atom? Niels Bohr
