WorksheetsCounting Atoms
Total questions: 15
Worksheet time: 11mins
Name
Class
Date
1.
How many Hydrogen are in 4H2O?
a)
6
b)
8
c)
2
d)
4
2.
How many Oxygen are in H2O?
a)
1
b)
2
c)
0
d)
4
3.
How many Magnesium are in 10MgCl2?
a)
10
b)
5
c)
20
4.
How many O's are in Al₂(SO₄)₃
a)
4
b)
12
c)
7
d)
24
5.
Number of H in 3(NH₄)₂CrO₄
a)
4
b)
2
c)
8
d)
24
6.
How many atoms are there TOTAL in:
H2SO4
H2SO4
a)
6
b)
5
c)
7
d)
3
7.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
8.
How many Sodium (Na) are in 6NaCl?
a)
1
b)
12
c)
6
9.
Number of N in (NH₄)₂CrO₄
a)
1
b)
2
c)
8
d)
16
10.
How many Sodium (Na) are in 6NaCl?
a)
1
b)
12
c)
6
11.
Number of N in (NH₄)₂CrO₄
a)
1
b)
2
c)
8
d)
16
12.
A subscript is the small number below a(n) ________ that tells the number of _______ of that element.
a)
element symbol; atoms
b)
atom; element symbol
c)
subscript; protons
d)
compound; elements
13.
How many O's are in Al₂(SO₄)₃
a)
4
b)
12
c)
7
d)
24
14.
Number of C's in 2Na₂CO₃
a)
1
b)
2
c)
3
d)
5
15.
How many atoms are in the element Carbon in this compound?
H2C3O4N5
H2C3O4N5
a)
2
b)
3
c)
4
d)
5
100 %
