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Edwards Unit 2 Review

Total questions: 34

Worksheet time: 20mins

Name
Class
Date
1.

What happens when two negatively charged ions are pushed together?

a)

they will repel (move apart)

b)

they will be attracted to each other (move together)

2.

What happens when two oppositely charged ions are pushed together?

a)

they will repel (move apart)

b)

they will be attracted to each other (move together)

3.

When an atom loses an electron, it becomes a

a)

positive ion

b)

negative ion

c)

neutral ion

d)

neutral atom

4.

How many valence electrons does hydrogen have?

a)

1

b)

2

c)

3

d)

4

5.
Ionic bonds are between...
a)
Metal and Non-metal
b)
Non-metal and Non-metal
c)
Metal and Metal
6.
Why do elements bond?
a)
To be friends
b)
To create a new element
c)
To become stable
7.
a substance formed when two or more elements are chemically bonded together
a)
Element Soup
b)
Pure Element
c)
Ion
d)
Compound
8.
Atoms that gain electrons become...
a)
negatively charged
b)
positively charged
c)
remain neutrally charged
d)
21
9.
An atom that has gained or lost electrons is called ...
a)
a winner
b)
an isotope
c)
an ion
d)
a loser
10.
Covalent bonds are between...
a)
Metal and Non-metal
b)
Non-metal and Non-metal
c)
Metal and Metal
11.
How are covalent bonds formed?
a)
Sharing of electrons
b)
Transfer of electrons
12.
How are ionic bonds formed?
a)
Transfer of electrons
b)
Sharing of electrons
13.
Which of these is not a real bond in chemistry?
a)
James
b)
Ionic
c)
Covalent
14.
Is hydrogen considered a metal or a non-metal?
a)
A metal
b)
Nonmetal
c)
Metalloid
15.
Ionic or covalent?
H2O
a)
Ionic
b)
Covalent
16.

Large molecules made up of small monomers are called

a)

polymers

b)

peptides

c)

peptones

d)

monomers

17.

Which of these is an example of synthetic polymer?

a)

cotton fibers

b)

rubber

c)

wool

d)

polyvinyl chloride (PVC)

18.

What is the name of the reaction used to make polymers?

a)

polymerization

b)

cracking

c)

polygonization

d)

precipitation

19.
the starting materials in a chemical reaction
a)
Products
b)
Reactants
c)
Starters
d)
Enders
20.
a substance that is formed as the result of a chemical reaction
a)
Product 
b)
Reactant
c)
Starters
d)
Enders
21.
tells us the number of atoms of each element in a compound
a)
Coeffecient
b)
Exponent
c)
Chemical Formula
d)
Calculator
22.
the symbolic representation of a chemical reaction
a)
Long Hand
b)
Short Hand
c)
Electron Configuration
d)
Chemical Equation
23.
a process or reaction in which the system absorbs energy from its surroundings; usually, but not always, in the form of heat
a)
Endothermic Reaction
b)
Exothermic Reaction
c)
Diffusion
d)
Fission
24.
a chemical reaction that releases energy by light or heat
a)
Endothermic Reaction
b)
Exothermic Reaction
c)
Diffusion
d)
Fission
25.
type of reaction in which two or more elements combine to form a more complex compound
a)
Double Displacement
b)
Single Displacement
c)
Synthesis
d)
Decomposition
26.
type of reaction in which a compound is broken down into its simple elements
a)
Double Displacement
b)
Single Displacement
c)
Synthesis
d)
Decomposition
27.

What does the number 3 represent in 4NH3?

a)

Subscript

b)

Superscript

c)

Coefficient

28.

What does the number 4 represent in 4NH3?

a)

Subscript

b)

Superscript

c)

Coefficient

29.

How many Nitrogen (N) atoms are in 4NH3?

a)

4

b)

1

c)

3

d)

12

30.

How many Hydrogen (H) atoms are in 4NH3?

a)

4

b)

1

c)

3

d)

12

31.

How many total molecules is 4NH3?

a)

4

b)

1

c)

3

d)

12

32.

In the equation shown, what are the reactant(s)?

a)

N2 + H2

b)

NH3

33.

In the equation shown, what are the product(s)?

a)

N2 + H2

b)

NH3

34.

To balance an equation you should:

a)

ONLY change subscripts.

b)

ONLY change coefficients.

c)

Change BOTH subscripts and coefficients.

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