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WorksheetsCounting Atoms
Total questions: 20
Worksheet time: 15mins
Name
Class
Date
1.
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
2.
Number of C's in 2Na₂CO₃
a)
1
b)
2
c)
3
d)
5
3.
The number of Na's in Na₂CO₃
a)
1
b)
2
c)
3
d)
6
4.
How many Elements are in the compound C2H8O ?
a)
2
b)
1
c)
3
d)
0
5.
How many total atoms are in the compound C2H8O ?
a)
11
b)
2
c)
8
d)
1
6.
How many Aluminum are in Al2O3?
a)
3
b)
2
c)
5
7.
How many Sodium (Na) are in 6NaCl?
a)
1
b)
12
c)
6
8.
How many Chlorine are in MgCl2?
a)
2
b)
1
c)
3
9.
How many Magnesium are in 10MgCl2?
a)
10
b)
5
c)
20
10.
How many Nitrogen are in 2AlN?
a)
4
b)
5
c)
1
d)
2
11.
How many atoms are there TOTAL in:
H2SO4
H2SO4
a)
6
b)
5
c)
7
d)
3
12.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
13.
How many atoms of Hydrogen are in this compound
a)
1
b)
2
c)
3
d)
4
14.
How many atoms of Oxygen are in this compound?
a)
1
b)
2
c)
3
d)
4
15.
How many atoms are in the element Carbon in this compound?
H2C3O4N5
H2C3O4N5
a)
2
b)
3
c)
4
d)
5
16.
How many TOTAL atoms are in this compound?
H2C3O4N5
H2C3O4N5
a)
5
b)
14
c)
15
d)
19
17.
In this compound structure of alcohol, how many Hydrogen atoms are there?
a)
2
b)
4
c)
6
d)
8
18.
a capital letter or combination of a capital letter and a small letter that is used to represent an element is called a(n) ________
a)
chemical symbol
b)
element sign
19.
What is the number of protons that the element in this image contain?
a)
14
b)
7
c)
15
d)
18
20.
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
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