Unit 2 Test

Question 1

Who came up with the idea of an Atom?

Answer 1

Democritus

Question 2

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

Answer 2

Dalton

Question 3

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

Answer 3

Lavoisier

Question 4

Who came up with the Law of Definite Proportions

Answer 4

Proust

Question 5

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

Answer 5

JJ Thomson

Question 6

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

Answer 6

Rutherford

Question 7

Who is the father of the periodic table?

Answer 7

Mendeleev (spell right)

Question 8

The smallest representative particle of an element?

Answer 8

Atom

Question 9

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

Answer 9

Proton +
Electron-
Neutron no charge (neutron)

Question 10

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

Answer 10

Protons, neutrons, electrons

Question 11

The atomic number tells us the number of _____

Answer 11

protons

Question 12

The mass is made up the number of _____ and ______

Answer 12

protons, neutrons

Question 13

Mass-Atomic number= ____

Answer 13

neutrons

Question 14

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

Answer 14

iscotopes

Question 15

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

Answer 15

octet

Question 16

When drawing a bohr model NEVER count the _______ _______.

Answer 16

transition metals

Question 17

Blue=
Red=
Black=
White=

Answer 17

liquids
gases
solids
synthetic

Question 18

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

Question 19

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.

Question 20

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

Answer 20

The staircase represents the metalloids.

Question 21

What determines how reactive an element is?

Answer 21

The closer you get to 8 the more reactive u become

Question 22

Whats the freaking chart?

Answer 22

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

Question 23

Whats the rule for significant figures?

Answer 23

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

Question 24

x and / =
+ and - =

Answer 24

same number of sig figs
same number of decimal places

Question 25

branches of chemistry

Answer 25

organic non-organic analytical physical biochem

Question 26

with carbon

Answer 26

organic

Question 27

without carbon

Answer 27

non-organic

Question 28

what its made of

Answer 28

analytical

Question 29

how it acts or its behavior

Answer 29

physical

Question 30

study of processes that take place in living organisms

Answer 30

biochem

Question 31

Draw the Cathode-ray tube

Question 32

draw JJ Thomson's model of the atom

Question 33

Draw the gold foil experiment

Question 34

Draw Rutherfords model of the atom

Question 35

what did Niels Bohr propose about the atom

Answer 35

It has energy levels

Question 36

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

Answer 36

chemical and physical

Question 37

There's _____ periods and ______ groups

Answer 37

7, 18

Question 38

Name three properties of metal

Answer 38

good conductors of heat and electricity, ductile, malleable

Question 39

Name three properties of nonmetals

Answer 39

most are gases, not good conductors of heat and electricity

Question 40

19 F 9

Answer 40

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

Question 41

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

Answer 41

steps to calculate atomic mass

Question 42

the ______ _______ determines its placement

Answer 42

energy level

Question 43

why is carbon so reactive?

Answer 43

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