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Science 10-1) > Unit 1) Chem Review > Flashcards

Unit 1) Chem Review Flashcards

1
Q

What did jj Thomson do

A

-He discovered electrons by using cathode rays to determine negatively charged object

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2
Q

What did bohr do

A

He proposed electrons orbit the nucleus of the atom in fixed energy levels
that can only hold so many electrons

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3
Q

What did Dalton do

A

law of conservation of mass-

concluded all atoms can’t be made or destroyed

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4
Q

When you take away Atomic number from mass number what does it give you

A

Neutrons

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5
Q

Atomic number is equal to______

A

Protons

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6
Q

Protons + neutrons =________

A

Mass number

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7
Q

What are the 7 types of elements on the periodic table

A

Alkali metals
Alkali earth metals
Metals
Non metals
Metalloids
Noble gases
Halogens

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8
Q

When drawing bohr diagrams how much can each level hold

A

1- 2
2- 8
3- 8

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9
Q

In molecular compounds do they give electrons

A

No on molecular compounds each element shares their own

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10
Q

Steps for naming molecular compounds

A

1) name elements in formula
2) use prefixes for charges (if the 1st elements is 1 then don’t write mono)
3)change ending to ide

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11
Q

4 diffrent types of compounds

A

Molecular
Ionic
Multivalent
Polyatomic

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12
Q

what ions ends in ate or ite

A

polyatiomic ions

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13
Q

what does (aq) mean

A

dissolved in water

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14
Q

what do acids have a ph of

A

below 7

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15
Q

when naming acids and it ends in ide what prefix does it go to / would you keep the hydo prefix

A

it would be ic and you would keep prefix

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16
Q

when naming acids and it ends in ate what prefix does it go to / would you keep the hydo prefix

A

it would be ic aswell and you wouldnt keep the hydro prefix

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17
Q

when naming acids and it ends in ite what prefix does it go to / would you keep the hydo prefix

A

it goes to ous and you wouldnt keep hydro prefix

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18
Q

all acids are what state of matter?

A

(aq)

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19
Q

do acids/bases conduct electricity

A

yes

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20
Q

do ionic and molecular conduct electicity

A

only ionic when (aq)
molecular can never

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21
Q

what do all bases have

A

(OH) - hydroxide are found in all bases

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22
Q

do molecular/ionic melt quick

A

molecular melts quick and ionic melts slow

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23
Q

what ph are bases

A

over 7

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24
Q

with acids what color do litmas paper turn, bromothymol blue turn,and phenothalein turn

A

litmas-red
bromothymol blue-yellow
phenothalein- clear

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25
with bases what color do litmas paper turn, bromothymol blue turn,and phenothalein turn
litmas- blue bromothymol blue- blue phenothalein- pink
26
chem properties def
a chemical reaction takes place to form a new product
27
physical properties def
the physical characteristics of something with no new chem product
28
anything with nitrate is what state of matter
(aq)
29
exothermic def
hot giving away heat
30
endothermic def
cold absorbing heat
31
physical or chem properties: state of matter/ melting and boiling points
it is physical because no reaction is happening to change the chem dna
32
chem or physical: ability to rust
it is a chemical property
33
on the periodic table state of matter represents black grey and white
black - liquid white-solid grey -gas
34
how many diatomic elements are there
7
35
how many chem reactions are there
5 formation decomposition single replacement double replaecment hydrocarbon combustion
36
When looking at the solubility table do you look for the anion first or the cation
You fist look for the anion across the top then look for the positive ion (cation)
37
When balancing equations when nothing is after elements what does that stand for
It stands for the element being equal to 1
38
what type of reaction is x+y—->xy
formation
39
what type of reaction is xy—–>x+y
decomposition
40
what type of reaction is a+bx——>ax+b or ax+y——>ay+x
single replacement
41
what type of reaction is ab+cd——>cb+ad
double replacement
42
what type of reaction is c, H (02)——>co+h20
hydrocarbon combustion
43
What chem reaction has two compounds
double replacement
44
What chem reaction has 1 elements and 2 compounds
single replacement
45
What chem reaction has two elements
formation
46
what order do you use to solve hydrocarbon combustion
1)carbon 2) hydro 3) oxygen
47
how do you find valance electrons
by looking at group number if the group number is in teens than its the last digit example) cesium (group 1 ) = 1 valance electrons
48
why do ionic compounds have high melting points
because the bonds are stronger between negative and positive because they attract better
49
why are molecular compounds not electrolytic
because they are weak and ionize only slightly or not at all
50
what is nucular notion
shows element symbol with mass number on the top left and atomic on the bottem left
51
what is the heaviest halogen
astatine
52
isotopes have same number of what and different what
same number of protons different number of neutrons
53
ernest rusherford found out what
nucleus is made up of protons and neutrons
54
what way are the periods on the periodic table side to side or up and down?
side to side group number is up and down
55
how do you make a Lewis dot diagram
1) find group number if in teens then use 2nd number 2) put dots around going right
56
crystal lattice def
ions/ ionic compounds arranged in repeating patterns called crystal lattice
57
malleable def
can be shaped by pressure
58
ductile def
can be stretched into a wire
59
how to find how many energy levels are needed in bohr diagrams
period number = energy levels
60
what do group numbers represent in bohr diagrams
the group number represents how many electrons are on the outer level
61
isotopes have the same number of what and different number of what
same number of protons different number of neutrons
62
Covalent meaning
It means sharing
63
when drawing a diagram for a element ion what extra steps do you take
find out if non metal ( gains) or metal (losses) then look at number with element bellow to determine how much electrons are being gained/lost
64
metal + polyatiomic is it ionic or molecular
ionic
65
what happens when you litmus test ionic and molecular
stays the same color
66
when a element ends with number it stands for what ex flourine-21
mass number and you need to sub protons to get your new neutrons
67
what theory did dalton come up with
the dalton ball theory
68
who came up with cathode rays
jj thomson
69
who came up with alpha particals
ernest rutherford
70
what do you look at to find the heavier element
the mass number
71
isotopes have same atomic number and what else
same protons
72
isotopes have difference numbers of neutrons and what else
different mass number
73
how to tell if a element is neutral
same protons and electrons ( not an ion )
74
Diffrence between ion and isotopes
Ion is same number of protons with the electrons varying and isotopes are same number of protons diffrent neutrons
75
what are traits of ionic compounds
-solid at room temp -high melting points -don't conduct as solids -when melted or dissolved they can conduct electricity
76
what are traits of molecular compounds
-solids, liquid or gas at room temp -low melting points -don't conduct as solids -when melted/dissolved cant conduct electricity
77
what are traits of an acid
-corrosive -conducts -less than 7 ph -reacts with metals
78
what are traits of bases
-corrosive -conducts electricity -over ph 7

Science 10-1) (10 decks)

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