WorksheetsCounting Atoms Review
Total questions: 16
Worksheet time: 9mins
Name
Class
Date
1.
How many Hydrogen are in 4H2O?
a)
6
b)
8
c)
2
d)
4
2.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
3.
How many atoms are there TOTAL in:
H2SO4
H2SO4
a)
6
b)
5
c)
7
d)
3
4.
How many Sodium (Na) are in 6NaCl?
a)
1
b)
12
c)
6
5.
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
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.
What elements are represented in this chemical formula? Fe2O3
a)
Iron, Oxygen
b)
Francium, Europium, Oxygen
c)
Ferrium, Oxygen
d)
Berylium, Oxygen
8.
Which chemical formula correctly displays 1 atom of nickel and 2 atoms of Fluorine?
a)
niF2
b)
NIF2
c)
Ni1F2
d)
NiF2
9.
What is the total number of atoms in this chemical formula? C8H3NaBr12
a)
18
b)
12
c)
25
d)
24
10.
Which element has the greatest number of atoms? AgNO3
a)
Silver
b)
Gold
c)
Nitrogen
d)
Oxygen
11.
Molecules that are made of more than one type of atom are called?
a)
Molecules
b)
Elements
c)
Mixtures
d)
Compounds
12.
How many O's are in Al₂(SO₄)₃
a)
4
b)
12
c)
7
d)
24
13.
Number of N in (NH₄)₂CrO₄
a)
1
b)
2
c)
8
d)
16
14.
How many atoms are present if there is no subscript following the element symbol?
a)
0
b)
2
c)
only 1
d)
1 million
15.
How many atoms of Oxygen are in Fe(NO3)3 ?
a)
6
b)
3
c)
9
d)
1
16.
The red numbers in the image below represent ________
a)
subscripts
b)
coefficients
c)
I don't know, and don't want to try
d)
None of the answers are correct
100 %
