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2021 Physical Science Final Review

Total questions: 40

Worksheet time: 40mins

Name
Class
Date
1.
Which of the following is NOT an accurate description of the nucleus?
a)
positively charged from the protons
b)
extremely dense from neutrons and protons
c)
negatively charged
d)
in the center of the atom
2.
Which subatomic particle along with the protons make up the total mass of an atom.
a)
Neutron
b)
Electrons
c)
Valence electrons
d)
protons make up all the mass
3.

Particles in an atom that are neutral and have no charge are

a)

negatrons

b)

electrons

c)

neutrons

d)

protons

4.

What is the number of protons that the element in this image contain?

a)

14

b)

7

c)

15

d)

18

5.

How many electrons are in Gold

a)

79

b)

118

c)

197

d)

276

6.

How many neutrons are in Gold

a)

118

b)

79

c)

197

d)

276

7.

How many protons are in Neon

a)

10

b)

20

c)

21

d)

30

8.

Which elements have the most similar chemical properties because they have the same number of valence electrons?

a)

boron and carbon

b)

oxygen and sulfur

c)

aluminum and bromine

d)

argon and silicon

9.

The noble gases (group 8A) are the most reactive elements because of their full valence shells.

a)

True

b)

False

10.

How many valence electrons does Hydrogen Have?

a)

1 Valence electron

b)

2 Valence electron

c)

3 Valence electron

d)

4 Valence electron

e)

5 Valence electron

11.

Which of the following will form a cation?

a)

Aluminum

b)

Sulfur

c)

Iodine

d)

Nitrogen

12.

Anions

a)

Gain electrons, has an overall positive charge

b)

Lose electrons, has an overall positive charge

c)

Lose electrons, has an overall negative charge

d)

Gain electrons, has an overall negative charge

13.

A Beryllium atom that has lost 2 electrons would look like

a)

Be2+

b)

B2-

c)

B2+

d)

Be2-

14.

Covalent bonds form between ---

a)

nonmetals.

b)

metals and metals

c)

metals and nonmetals

15.

Atoms form compounds to become more ---

a)

reactive

b)

stable

c)

explosive

d)

toxic

16.

Which of the following is NOT a covalent bond?

a)

K2S

b)

H2O

c)

I2

d)

CO2

17.

Which of the following is NOT an ionic bond?

a)

NH3

b)

KCl

c)

K3N

d)

NaCl

18.

According to the Octet Rule, atoms of elements react with each other in order to attain ____ electrons in their outermost energy level or shell.

a)

2

b)

4

c)

8

d)

10

19.
Atoms form compounds when the compound is more ______________ than the separate atoms.  Noble gases are more _________than other elements because they have a complete outer energy level.
a)
reactive
b)
stable
c)
explosive
d)
toxic
20.
Atoms gain lose, gain, or ______electrons to get a stable outer energy level.
a)
share
b)
split
c)
create
d)
destroy
21.

Which of the following describes covalent bonds?

a)

Bonds form because of opposite charges

b)

electrons are shared to fill outer electron shells

c)

Electrons are transferred between atoms

d)

Covalent bonds are magical

22.
An ionic bond is the attraction between:
a)
oppositely charged ions
b)
similarly charged ions
c)
neutral ions
d)
neutral atoms
23.

Ionic bonds form between ---

a)

nonmetals.

b)

metals and nonmetals.

24.

What is the Law of Conservation of Mass?

a)

It states that matter cannot be created or destroyed.

b)

It states that energy cannot be created or destroyed.

c)

It states that matter can be created or destroyed.

d)

It states that sound can be created or destroyed.

25.
How many HCl molecules do you need to balance this equation? 
Mg +  __HCl --->  MgCl2 + H2
a)
1
b)
2
c)
3
d)
4
26.

Is the equation balanced?: 2H2O + O2 --> 4MgO + 3Fe

a)

yes

b)

no

27.

Balance this equation

_Al +_HCl --> _H2 +_AlCl3

a)

2,6,3,2

b)

it's already balanced

c)

4,12,3,4

d)

2,1,4,5

28.
Balance this equation
_N2 + _H2 --> _NH3
a)
1,2,3
b)
1,3,2
c)
1,1,2
d)
2,1,1
29.
Which of the following is an unbalanced equation?
a)
CaCO3 --> CaO + CO2
b)
PbO2 + 2H2-->2Pb + H2O
c)
2Na+ 2H2O-->2NaOH + H2
d)
CS2 + 2O2 --> CO2 + 2SO2
30.
Is the following equation balanced?
4Fe + 3O2 --> 2Fe2O3
a)
yes
b)
no
31.
What are the smaller numbers that you CANNOT change in a chemical equation? 
a)
Coefficient
b)
Products
c)
Reactants
d)
Subscript
32.
What are the larger numbers that you CAN CHANGE in a chemical equation? 
a)
Coefficient 
b)
Products
c)
Reactants
d)
Subscripts
33.

What criteria must be met for reactant collisions to result in a successful product?

a)

The reactants must collide with each other

b)

The reactants must collide with enough energy and be in the right positions

c)

The reactants must have enough energy to form the activated complex

34.
More collisions correspond to a: 
a)
Faster reaction rate  
b)
Slower reaction rate
c)
Constant reaction rate 
d)
None of the above
35.

What is the rate of reaction?

a)

How much energy is needed for a reaction to occur.

b)

The energy required to break a bond.

c)

The time it takes for a reaction to occur.

d)

Collision Theory

36.

Which of the following increase the reaction rate?

a)

less surface area

b)

lower temperature

c)

increased concentration

37.

The substance or particles that enter into and are altered in the course of a chemical reaction.

a)

Catalyst

b)

Enzyme

c)

Product

d)

Reactant

38.

The number of particles present in a given volume of solution.

a)

Catalyst

b)

Concentration

c)

Product

d)

Temperature

39.

The factor that would NOT affect the rate of a chemical reaction.

a)

Concentration

b)

Humidity

c)

Particle Size (Surface Area)

d)

Temperature

40.

The minimum amount of energy needed for colliding particles to react is called the

a)

Chemical Energy

b)

Kinetic Energy

c)

Activation Energy

d)

Potential Energy

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