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Chemistry > Unit 2 Test > Flashcards

Unit 2 Test Flashcards

1
Q

Who came up with the idea of an Atom?

A

Democritus

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2
Q

Who came up with the first Atomic Theory and was a school teacher?

A

Dalton

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3
Q

Who came up with the law of conservation of mass that states that mass is neither created nor destroyed in a chemical reaction.

A

Lavoisier

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4
Q

Who came up with the Law of Definite Proportions

A

Proust

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5
Q

Who came up with the Cathode Ray tube which discovered electrons?

A

JJ Thomson

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6
Q

Who did the gold foil experiment and that atoms are mostly empty space?

A

Rutherford

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7
Q

Who is the father of the periodic table?

A

Mendeleev (spell right)

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8
Q

The smallest representative particle of an element?

A

Atom

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9
Q

What are the subatomic particles in an atom and their charge?

A

Proton +
Electron-
Neutron no charge (neutron)

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10
Q

___ and ___ are in the nucleus and _____ are floating outside the nucleus.

A

Protons, neutrons, electrons

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11
Q

The atomic number tells us the number of _____

A

protons

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12
Q

The mass is made up the number of _____ and ______

A

protons, neutrons

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13
Q

Mass-Atomic number= ____

A

neutrons

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14
Q

elements that have the same number of protons but a different number of neutrons

A

iscotopes

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15
Q

What is the rule that states that everybody wants 8 valence electrons?

A

octet

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16
Q

When drawing a bohr model NEVER count the _______ _______.

A

transition metals

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17
Q

Blue=
Red=
Black=
White=

A

liquids
gases
solids
synthetic

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18
Q

Draw where the periods and groups are on the periodic table.

A
19
Q

Identify where the metals, non-metals, metalloids, halogens, transition metals, Alkaline earth metals, alkali metals, noble gases, lanthanides, and actinides are on the periodic table.

A
20
Q

What is the staircase and where is it located on the table.

A

The staircase represents the metalloids.

21
Q

What determines how reactive an element is?

A

The closer you get to 8 the more reactive u become

22
Q

Whats the freaking chart?

A

giga 10^9
mega 10^6
kilo 10^3
centi 10^-2
milli 10^-3
micro 10^-6
nano 10^-9
pico 10^-12

23
Q

Whats the rule for significant figures?

A

1st non zero digit from the left is significant and everything that comes after that is significant.

24
Q

x and / =
+ and - =

A

same number of sig figs
same number of decimal places

25
Q

branches of chemistry

A

organic
non-organic
analytical
physical
biochem

26
Q

with carbon

A

organic

27
Q

without carbon

A

non-organic

28
Q

what its made of

A

analytical

29
Q

how it acts or its behavior

A

physical

30
Q

study of processes that take place in living organisms

A

biochem

31
Q

Draw the Cathode-ray tube

A
32
Q

draw JJ Thomson’s model of the atom

A
33
Q

Draw the gold foil experiment

A
34
Q

Draw Rutherfords model of the atom

A
35
Q

what did Niels Bohr propose about the atom

A

It has energy levels

36
Q

valence electrons largely determine the ______ and _______ properties of an element.

A

chemical and physical

37
Q

There’s _____ periods and ______ groups

A

7, 18

38
Q

Name three properties of metal

A

good conductors of heat and electricity, ductile, malleable

39
Q

Name three properties of nonmetals

A

most are gases, not good conductors of heat and electricity

40
Q

19
F
9

A

19= mass number
9= atomic number
F= chemical symbol

41
Q
  1. change % to decimal
  2. multiply by mass
  3. add sum together
A

steps to calculate atomic mass

42
Q

the ______ _______ determines its placement

A

energy level

43
Q

why is carbon so reactive?

A

because it has 1 valence electron which is so close to 8 (octet rule)

Chemistry (17 decks)

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