Worksheetscounting atoms
Total questions: 25
Worksheet time: 17mins
Name
Class
Date
1.
# of Hydrogen atoms in H2O
a)
2
b)
10
c)
non
d)
1
2.
where is the coefficient
a)
beginning
b)
middle
c)
end
d)
no such thing
3.
where is the subscript
a)
beginning
b)
middle
c)
end
d)
no such thing
4.
total # of atoms in Ba(NO3)3
a)
13
b)
7
c)
3
d)
19
5.
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
6.
How many Aluminum are in Al2O3?
a)
3
b)
2
c)
5
7.
Who is an amazing teacher??
a)
Mrs. Mincey
b)
bob
c)
Bob
d)
BoB
8.
How many atoms are there TOTAL in:
H2SO4
H2SO4
a)
6
b)
5
c)
7
d)
3
9.
How many Sodium (Na) are in 6NaCl?
a)
1
b)
12
c)
6
10.
Number of N in (NH₄)₂CrO₄
a)
1
b)
2
c)
8
d)
16
11.
What is the total of H2O and NaCl of captail letters
a)
2
b)
4
c)
3
d)
8
12.
A pure substance that cannot be broken down into simpler substances.
a)
element
b)
compound
c)
molecule
d)
carbon dioxide
13.
How many Magnesium atoms are in 10MgCl2?
a)
10
b)
5
c)
20
d)
12
14.
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
15.
Which of the following is NOT an element?
a)
H2O
b)
H2
c)
O2
d)
Au
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
17.
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
18.
How many atoms of aluminum are on each side of the following equation: 4Al + 3O2 --> 2Al2 O3
a)
2
b)
6
c)
1
d)
4
19.
Is the following equation balanced or unbalanced?
Fe + S --> FeS
Fe + S --> FeS
a)
balanced
b)
unbalanced
20.
How many Magnesium are in 10MgCl2?
a)
10
b)
5
c)
20
21.
Is this equation balanced?
a)
yes
b)
no
c)
Not enough information
22.
Is this equation balanced?
a)
yes
b)
no
c)
Not enough information
23.
In this compound structure of alcohol, how many Hydrogen atoms are there?
a)
2
b)
4
c)
6
d)
8
24.
Is this equation balanced?
a)
yes
b)
no
c)
Not enough information
25.
The law of conservation of matter states that
a)
chemical reactions change matter.
b)
in chemical reactions, the identity of reactants and products is conserved.
c)
atoms are neither created nor destroyed in chemical reactions.
d)
a chemical equation must be balanced.
100 %
