Free Printable Chemistry I Review

1.

$2H_2\ +\ O_2\ ->\ 2H_2O$

What are the reactants?

(a)

2.

$2H_2\ +\ O_2\ ->\ 2H_2O$

What are the products?

(a)

3.

$2H_2$ - What is the number "2" in front of the H called?

a)

coefficient

b)

number

c)

molecules

d)

atoms

4.

How many hydrogen atoms are needed to produce two molecules of water?

H_2O

a)

2

b)

3

c)

4

d)

5

5.

How many oxygen atoms are needed to produce two molecules of water?

H_2O

a)

1

b)

2

c)

3

d)

4

6.

Balance the following equation:

Fe+O_2→Fe_2O_3

a)

$4Fe+3O_2→\ 2Fe_2O_3$

b)

$4Fe+O_2→\ 2Fe_2O_3$

c)

$Fe+2O_2→\ 2Fe_2O_3$

d)

It is already balanced

7.

Balance the following equation:

H_2+Cl_2→HCl

a)

$H_2+2Cl_2→HCl$

b)

$H_2+Cl_2→\ 2HCl$

c)

$2H_2+Cl_2→HCl$

d)

It is already balanced

8.

Balance the following equation:

Ag+H_2S→\ Ag_2S+H_2

a)

$Ag+2H_2S→\ Ag_2S+2H_2$

b)

$2Ag+H_2S→\ 2Ag_2S+H_2$

c)

$2Ag+H_2S→\ Ag_2S+H_2$

d)

It is already balanced

9.

Balance the following equation:

CH_4+O_2→CO_2+H_2O

a)

$CH_4+2O_2→CO_2+2H_2O$

b)

$CH_4+2O_2→CO_2+H_2O$

c)

$CH_4+O_2→CO_2+2H_2O$

d)

It is already balanced

10.

Balance the following equation:

Co+H_2O→Co_2O_3+H_2

a)

$2Co+3H_2O→Co_2O_3+H_2$

b)

$2Co+3H_2O→Co_2O_3+3H_2$

c)

$Co+H_2O→Co_2O_3+3H_2$

d)

It is already balanced

11.

This electron configuration belongs to what element?

1^2s2s^22p^63s^23p^64s^2

a)

Potassium

b)

Calcium

c)

Strontium

d)

Scandium

12.

This electron configuration belongs to what element?

1^2s2s^22p^63s^23p^64s^23d^6

a)

Iron

b)

Calcium

c)

Cobalt

d)

Nickel

13.

This electron configuration belongs to what element?

1^2s2s^22p^63s^23p^64s^23d^{10}4p^65s^24d^{10}5p^2

a)

Lead

b)

Indium

c)

Antimony

d)

Tin

Chemistry I Review

Total questions: 13

Worksheet time: 8mins

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