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WorksheetsCounting Atoms
Total questions: 10
Worksheet time: 14mins
Name
Class
Date
1.
The blue numbers in the image below represent ________
a)
I don't know, and don't want to try
b)
coefficients
c)
subscripts
d)
none of the answers are correct
2.
Which chemical formula correctly displays 1 atom of Ni, and 2 atoms of F?
a)
niF2
b)
NIF2
c)
Ni1F2
d)
NiF2
3.
How many carbon atoms are in this compound?
H2C3O4N5
a)
2
b)
3
c)
4
d)
5
4.
What is the total number of atoms in 3Na₂B₄O₇ ?
a)
3
b)
13
c)
23
d)
39
5.
How many oxygen atoms are in Al₂(SO₄)₃
a)
4
b)
12
c)
7
d)
24
6.
What is a coefficient?
a)
The small number on the right of the chemical symbol.
b)
The large number to the left of a formula.
7.
Number of C's in 2Na₂CO₃
a)
1
b)
2
c)
3
d)
5
8.
Which is the correct formula for:
three hydrogen (H)
one sulfur (S)
four oxygen (O)
three hydrogen (H)
one sulfur (S)
four oxygen (O)
a)
H3SO4
b)
HSO4
c)
H4S3O
d)
H2O
9.
How many atoms of each element are in on eof 2-heptaone?
a)
A
b)
B
c)
C
d)
D
10.
HOw many sulfur atoms are in the formula for socium sulfate?
a)
1
b)
2
c)
6
d)
7
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