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Unit 2 - (Chemistry) Revision

Total questions: 45

Worksheet time: 27mins

Name
Class
Date
1.

What charge do protons have?

a)

positive

b)

negative

c)

neutral

2.

What charge do electrons have?

a)

positive

b)

negative

c)

neutral

3.

Which subatomic particles are found in the nucleus?

a)

protons

b)

neutrons

c)

electrons

d)

protons and electrons

e)

protons and neutrons

4.

The atomic number is always the number of

a)

protons

b)

neutrons

c)

electrons

5.

What part of the atom is the arrow pointing to?

a)

Proton

b)

Neutron

c)

Electron

6.

What part of the atom is the arrow pointing to?

a)

Proton

b)

Neutron

c)

Electron

7.

What is the atomic number of this element?

a)

O

b)

8

c)

16

8.

Where are Electrons located?

a)

In the nucleus

b)

In the electron cloud

c)

Next to the protons

9.

The periodic table is arranged in horizontal rows called:

a)

columns

b)

groups

c)

periods

10.

The periodic table is arranged in vertical columns called:

a)

columns

b)

groups

c)

periods

11.
What gives an atom mass?
a)
Protons & electrons in the nucleus
b)
electrons in the cloud
c)
protons & neutrons in the nucleus
d)
Protons & electrons in the cloud
12.
If an atom has 24 protons and 24 electrons, what is the atomic number of this element?
a)
24
b)
48
c)
0
d)
42
13.
What's a valence electron?
a)
electrons in the second energy level
b)
electrons in the outermost energy level
c)
the atomic number
d)
electrons in the first level
14.

How many protons does this element have?

a)

40

b)

21

c)

20

d)

41

15.
The horizontal row on the periodic table is called a
a)
group
b)
family
c)
period
d)
atomic number
16.
What does the 1.00794 stand for?
a)
Hydrogen
b)
atomic number
c)
atomic mass
d)
atomic explosion
17.

Which subatomic particle has a POSITIVE charge?

a)

electron

b)

neutron

c)

proton

18.

What does the number 11 stand for in the Sodium block?

a)

atomic number

b)

atomic weight

c)

Stranger Things

19.

What does the K stand for in the Potassium block?

a)

Atomic number

b)

Atomic weight

c)

Symbol for the atom

20.
The scientist responsible for "discovering" the nucleus is:
a)
Bohr
b)
Rutherford
c)
Schroedinger
d)
Einstein
21.
"Everything is composed of atoms" was stated by:
a)
Democritis
b)
Dalton
c)
Moseley
d)
Einstein
22.
How did Rutherford discover the proton?
a)
Cathode tube ray experiment
b)
Gold Foil Experiment
c)
Planetary Model
d)
Plum Pudding Model
23.
In a ___________change, a substance changes into a different substance.
a)
Physical
b)
Chemical
24.
An gel ice pack getting cold after you put it in the freezer for an hour.
a)
Chemical Change
b)
Physical Change
25.
Which of the following IS a physical change?
a)
Getting a haircut
b)
Rusty metal
c)
sour milk
d)
A compound
26.
The smell your dog makes after eating to much people food.
a)
Chemical Change
b)
Physical Change
27.

Cutting Paper

a)

Physical Change

b)

Chemical Change

28.

Frying Eggs

a)

Physical Change

b)

Chemical Change

29.

Toasting Bread

a)

Physical Change

b)

Chemical Change

30.

Rotting Fruit (Like a brown banana)

a)

Physical Change

b)

Chemical Change

31.

Which is not evidence that a chemical reaction has occured

a)

Production of flames

b)

Change in temperature or heat

c)

freezing

d)

Production of light

32.
_______________ is an example of both a color change and new substance produced from a chemical change with oxygen and metal.
a)
shredded paper
b)
rust (iron oxide)
c)
wood chips
d)
melted wax
33.

What is the change from solid state to liquid state called?

a)

a. Vaporation

b)

b.Melting

c)

c. Evapoation

34.

Frozen water or ice is in the solid state.

a)

a, True

b)

b. False

35.

What happens to water when it evaporates?

a)

a. It becomes a solid.

b)

b. It is no longer matter.

c)

c. It becomes a gas.

36.

What is the change of matter from a gas to a liquid?

a)

a. evaporation

b)

b. condensation

c)

c. freezing

37.

When enough ______________ is added to the solid ice cubes, the melt.

a)

a. water vapors

b)

b. particles

c)

c. heat energy

38.

Heat makes the particles of frozen water move _____________ and farther apart.

a)

a. faster

b)

b. slower

c)

c. the same

39.

A _____________ is matter that spreads out in all directions.

a)

a. solid

b)

b. gas

c)

c. liquid

40.

_____________ is the change of matter from a solid to a liquid.

a)

a. freezing

b)

b. boiling

c)

c. melting

41.

When a liquid changes to a gas, it

a)

a. evaporates

b)

b. condenses

c)

c. freezes

42.

When water vapor loses heat, its particles move more ____________ and move ___________ together. The water vapor changes to liquid water.

a)

a. faster, farther

b)

b. slowly, closer

c)

c. faster, closer

43.

What is change of matter from a gas to a liquid.

a)

a. evaporation

b)

b. condensation

c)

c. freezing

44.

If it is a hot sunny day and you have a cold glass of water filled with ice cubes. You notice that drops of water form on the outside of the glass. This is called ____________.

a)

a. evaporation

b)

b. condensation

c)

c. precipitation

45.

I have listened and worked hard in science this Unit and understand it ALL.

a)

Kind of 50 / 50

b)

100%. YES

c)

What is science?

d)

I don't know.

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