Free Printable Concept 1 Chemistry Review

1.

For the following chemical reaction, which substance is a reactant?

$2HBr\ +\ Mg\left(OH\right)_2\ →\ MgBr_2\ +2H_2O$

a)

$MgBr_2$

b)

$Br$

c)

Mg

d)

HBr

2.

What type of reaction is the following reaction?

$Li_3PO_4+3NaBr\rightarrow Na_3PO_4+3LiBr$

a)

Combination

b)

Decomposition

c)

Single-Replacement

d)

Double-Replacement

3.

What type of reaction is the following reaction?

$2Al_2O_3\rightarrow4Al+3O_2$

a)

Combination

b)

Decomposition

c)

Combustion

d)

Double-Replacement

4.

What type of chemical reaction is this?

$2C_8H_{18}+25O_2\rightarrow16CO_2+18H_2O$

a)

Combination

b)

Combustion

c)

Single-Replacement

d)

Double-Replacement

5.

How many Oxygen atoms do I have in the following compound?

$2\left(NH_4\right)_3PO_4$

a)

4

b)

6

c)

8

d)

24

6.

How many Hydrogen atoms do I have in the following compound?

$2\left(NH_4\right)_3PO_4$

a)

4

b)

12

c)

9

d)

24

7.

What number do I need to balance the following chemical reaction?

$C_4H_8+$ _ $O_2\rightarrow4CO_2+4H_2O$

a)

2

b)

4

c)

6

d)

8

8.

What number do I need to balance the following chemical equation?

$2Al+6HCl\rightarrow3H_2+$ _ $AlCl_3$

a)

1

b)

2

c)

4

d)

6

9.

In a chemical equation, you have reactants that come together to react and they form ___________.

a)

substrates

b)

catalysts

c)

combustion

d)

products

10.

The Law of Conservation of Mass states

a)

that matter exists in all states and reacts the same

b)

that matter can only be changed into new substances by introducing a catalyst

c)

that matter exists in the same state throughout any chemical change

d)

that matter cannot be created or destroyed

11.

Valence electrons are found

a)

in the innermost energy level of an atom

b)

in the middle energy levels of an atom

c)

in the outermost energy levels of an atom

12.

An atom with 3 valence electrons "wants" a full shell, so it can either gain 5 or lose 3. Which is more likely to occur?

a)

Gain 5

b)

Lose 3

c)

Nothing

13.

How do covalent bonds form?

a)

By donating and receiving valence electrons between atoms.

b)

Scientists still aren't sure.

c)

Opposite slight charges attract each atom in the compound.

d)

Sharing valence electrons between atoms

14.

What two types of atoms make a covalent bond?

a)

2 Nonmetals

b)

1 Metal and 1 Nonmetal

c)

2 Metals

d)

2 Noble Gases

15.

How are ionic bonds formed?

a)

Transfer of electrons

b)

Sharing of electrons

16.

What kind of bond will form between Hydrogen and Oxygen?

a)

ionic

b)

covalent

c)

metallic

d)

no bond

17.

Ionic bonds are between...

a)

Metal and Non-metal

b)

Non-metal and Non-metal

c)

Metal and Metal

18.

Why do elements bond?

a)

To be friends

b)

To create a new element

c)

To become stable

19.

Where are the nonmetals located on the periodic table?

a)

Blue

b)

Red

c)

Green

20.

This could be the dot diagram of

a)

Mg

b)

Cl

c)

C

d)

O

21.

How many valence electrons should Lithium have in its Lewis dot model?

a)

1

b)

2

c)

3

d)

4

22.

How would you draw a Lewis dot diagram for Magnesium?

a)

b)

c)

d)

Concept 1 Chemistry Review

Total questions: 22

Worksheet time: 15mins

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