Chemistry

Question 0

If the element is neutral (no charge) then it should have the same number of what?

Answer 0

It should have the same number of protons and electrons

Question 1

What is the atomic number and where is it found on an element box?

Answer 1

Is the number or protons in the element, and the atomic number is found on the top left hand corner of the box

Question 2

What is the mass number and where is it located on an element box?

Answer 2

It’s the number of how many protons and neutrons found in the element (protons + neutron or mass # - atom # = the number of neutrons) it is found on the bottom of the box

Question 3

Name the element, the atomic number, atomic mass, number of protons, number of neutrons and the number of electrons for this element: Pb

Answer 3

Lead,82,207.2,82,125,82

Question 4

How many electrons should be in the 3rd shell of a Bohr diagrams?

Answer 4

There should be 8

1st: 2
2nd: 8
3rd: 8
4th: 18

Question 5

What is a valence shell? And if said shell was full what is the atom considered?

Answer 5

A valence shell is the outermost shell of an atom and if the valence is full the atom is considered stable

Question 6

Name the properties of metals

Answer 6

• They are very good heat and electricity conductors
• Malleable: can be beaten into thin sheets
• Ductile: can be stretched into wire
• Metallic: lustre (ie Shiny)
• Most are solid at room temperature

Question 7

Name the properties of non-metals

Answer 7

• gain or share valence electrons easily
• Poor conductors of heat and electricity
• Brittle: breaks easily if solid
• Not ductile: not easily stretched
• Doesn’t possess a metallic lustre
• All states at room temperature (liquid,solid, gas)

Question 8

Name the properties of a metalloid

Answer 8

• Acts like a non-metal,when they react with metals
• Acts like a metal, when they with non-metals
• Have semi-conductors properties

Question 9

Name the metals in the Alkali metals family

Answer 9

Li: Lithium
Na: Sodium
K: Potassium 
Rb: Rubidium
Cs: Cesium
Fr: Francium

Question 10

What makes hydrogen special?

Answer 10

The fact that it acts like a metal and non-metal, it has 1 valence electron, very reactive, at room temperature hydrogen is a gas, and it is extremely flammable.

Question 11

What is the difference between an atom and an ion?

Answer 11

Atoms are neutral and iron have a charge

Question 12

What is the name of the 2 compounds?

Answer 12

Ionic and covalent

Question 13

What is an ionic compound formula?

Answer 13

Metal + non-metal -> ionic compound (salts)

Question 14

Write the ionic compound formula for: silver carbonate.

Answer 14

Ag2CO3

Question 15

Name the chemical formula for this ionic compound: PbO

Answer 15

Lead(II) Oxide

Question 16

What is the covalent compound formula?

Answer 16

Covalent compound-> nonmetal/nonmetal

Question 17

Name the following covalent compound: N2O

Answer 17

Dinitrogen Monoxide

Question 18

Write the formula of this following compound: Diiodine hexachloride

Answer 18

I2Cl6

Question 19

Is this an ionic or covalent compound: Na2CrO4 and what is its chemical name?

Answer 19

Ionic and it Disodium trioxide

Question 20

Magnesium metal reacts with oxygen gas to produce magnesium oxide and a bright light (light energy). What is the chemical and word equation for this?

Answer 20

Word equation:
Magnesium + oxygen-> magnesium oxide + energy
Chemical equation:
Mg+O2 -> MgO+energy

Question 21

Aluminum reacts with iron (II) oxide to produce aluminum oxide and iron. What is the word and chemical equations?

Answer 21

Word equation:
Aluminum+iron(II) oxide -> aluminum oxide + iron
Chemical equation:
Al+FeO -> Al2O3 + Fe

Question 22

Name the elements in the Alkaline earth metals

Answer 22

Be: Beryllium 
Mg: Magnesium
Ca: Calcium
Sr: Strontium 
Ba: Barium
Ra: Radium

Question 23

Name the elements in the halogens family

Answer 23

F: Fluorine
Cl: Chorine
Br: Bromine
I: Iodine
At: Astaline

Question 24

Name the elements in the Noble gases family

Answer 24

``` He: Helium Ne: Neon Ar: Argon Kr: Krypton Xe: Xenon Rn: Radon ```

Question 25

Name the elements in the magic 7+1

Answer 25

``` N: Nitrogen O: Oxygen F: Fluorine Cl: Chlorine Br: Bromide I: Iodine At: Astaline H: Hydrogen ```

Question 26

Balance this equation: NaI + AlCl3 -> NaCl + AlI3 (I recommend you write It down when you answer)

Answer 26

3NaI + AlCl3 -> 3NaCl + AlI3

Question 27

Balance this equation: | C3H8 + O2 -> CO2 + H2O

Answer 27

C3H8 + 5O2 -> 3CO2 + 4H2O

Question 28

Write the equation for the following and balance it: | Nitrogen monoxide + oxygen -> nitrogen dioxide

Answer 28

2No + O2 -> 2NO2

Question 29

Write the equation for the following and balance it: | Phosphorus trichloride + Chlorine -> phosphorus pentachloride

Answer 29

PCl3 + 2Cl -> PCl5

Question 30

What reaction is this? | 2Na + Cl2 -> 2NaCl

Answer 30

Synthesis

Question 31

Name this reaction: | 2H2O -> 2H + O2

Answer 31

Decomposition

Question 32

What is this reaction? | 2Al + 3CuCl2 -> 3Cu + 2AlCl3

Answer 32

Single replacement

Question 33

What is this reaction? | Pb(NO3)2 + 2NaI -> 2NaNO3 + PbI2

Answer 33

Double replacement

Question 34

What is the element that a base on the end of its formula?

Answer 34

OH: Hydroxide

Question 35

What is the element that is at the beginning of the acid formulas?

Answer 35

H

Question 36

What is a pH scale?

Answer 36

A scale for measuring how acidic or basic a solution is

Question 37

Define Acids

Answer 37

Chemical compounds that produce a solution with a pH of less than 7 when dissolved in water

Question 38

Define Bases

Answer 38

Chemical compounds that produce a solution with a pH of more that 7 when they dissolve in water

Question 39

Define neutral

Answer 39

If the solution has a pH of 7 it is neither acidic or basic

Question 40

The____ the pH, the ____ the acid. | Fill in the blank

Answer 40

Lower, stronger

Question 41

The ____ the pH the_____ the base

Answer 41

Higher, stronger

Question 42

What is pure water? Is it acidic, basic or neutral?

Answer 42

Neutral

Question 43

What is the formula for acid-base neutralization look like?

Answer 43

HCl+NaOH -> NaCl+H2O | Acid) + (base) -> (salt) + (water

Question 44

Complete this neutralization formula: | HF + Ca(OH)2 ->

Answer 44

HF + Ca(OH)2 -> H2O + CaF2

Question 45

Now figure it out the other way around: | ____+_____ -> MgCO3 + H2O

Answer 45

H2CO3 + Mg(OH)2 -> MgCO3 +H2O

Question 46

what are the properties of an acid | Aka the taste of it, how it feels, it's pH range, the type of ion formed and if it conducts energy

Answer 46

``` Taste: sour Touch: burn pH range: <7 Type of ion formed: H+ Conducts electricity: yes ```

Question 47

What is the properties of bases? | Aka the taste of it, how it feels, it's pH range, the type of ion formed and if it conducts energy

Answer 47

``` Taste: bitter Touch: Burn, slippery pH range: >7 Type of ion formed: OH- Conducts electricity: yes ```

Question 48

What is an organic compound?

Answer 48

ALMOST every carbon

Question 49

What are the exceptions to the organic compound? What compound with carbon are inorganic?

Answer 49

The carbonate group Carbide (when carbon is the last element in the formula) Oxides (oxygens are the last element and also when their are only 2 elements)

Question 50

Is CH3CH2OH organic or inorganic?

Answer 50

Organic

Question 51

Is FeCl2 organic or inorganic?

Answer 51

Inorganic: because there is no carbons in the formula

Question 52

Define a combustion reaction and give a formula for it

Answer 52

Occurs when an organic compound burns in oxygen | Organic + O2 -> CO2 + H2O

Question 53

Answer this; C3H8 + O2 ->____

Answer 53

C3H8 + O2 -> CO2 + H2O