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Counting Atoms And Elements
Test Description: Students will practice counting atoms and elements when presented with chemical formulas.
Instructions: Answer all questions to get your test result.
1) How many atoms are in water (H2O)?
A
4
B
3
C
1
D
2
2) How many elements are in water (H2O)?
A
3
B
2
C
4
D
1
3) How many atoms are in sulfuric acid (H2SO4)?
A
3
B
7
C
5
D
6
4) How many elements are in sulfuric acid (H2SO4)?
A
3
B
2
C
7
D
6
5) How many atoms are in carbon dioxide (CO2)?
A
1
B
2
C
3
D
4
6) How many elements are in carbon dioxide (CO2)?
A
4
B
3
C
2
D
1
7) How many atoms are in hydrogen peroxide (H2O2)?
A
4
B
8
C
2
D
1
8) How many elements are in hydrogen peroxide (H2O2)?
A
2
B
4
C
8
D
1
9) How many atoms are in propane (C3H8)?
A
2
B
3
C
11
D
8
10) How many elements are in propane (C3H8)?
A
3
B
8
C
2
D
11
11) How many atoms are in vinegar (C2H4O2)?
A
3
B
2
C
8
D
4
12) How many elements are in vinegar (C2H4O2)?
A
8
B
2
C
3
D
6
13) How many atoms are in six copies of a water molecule (6 H2O)?
A
18
B
6
C
12
D
3
14) How many atoms are in 5 copies of molecular nitrogen (5 N2)?
A
10
B
5
C
7
D
2
15) How many atoms are in sand (SiO2)?
A
6
B
4
C
2
D
3
16) How many elements are in sand (SiO2)?
A
2
B
1
C
4
D
3
17) What element(s) is carbon dioxide made up of (CO2)?
A
Carbon and oxygen
B
Cobalt
C
Cobalt and oxygen
D
Oxygen
18) What elements are found in lighter fuel (C4H10)?
A
Carbon and Hydrogen
B
Hydrogen
C
Carbon
D
Carbon, Hydrogen, and Oxygen
19) Iron chemically reacts with oxygen in the air to form iron oxide/rust (Fe2O3). Is rust a mixture or a compound?
A
Mixture
B
Both
C
Neither
D
Compound
20) Mixtures can be separated because ________
A
They have weak bonds
B
They have reversible chemical bonds
C
No chemical bonds are formed
D
The chemical bonds that are formed are easy to break
*select an answer for all questions
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