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WorksheetsChemical Formulas
Total questions: 15
Worksheet time: 12mins
Name
Class
Date
1.
How many atoms of carbon (C) are in C6H12O6?
a)
3
b)
6
c)
12
d)
24
2.
Element or compound?
H2O
H2O
a)
element
b)
compound
3.
Which of the following is a compound?
a)
Co
b)
O2
c)
C
d)
CO2
4.
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
5.
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
6.
Which of the following is a positively charged subatomic particle found in the nucleus of an atom?
a)
Electron
b)
Proton
c)
Neutron
d)
Quark
7.
An atom has an atomic number of 15 and a mass number of 31. How many protons are there in the atom?
a)
15
b)
31
c)
16
d)
47
8.
The blue atoms are called
a)
metals
b)
nonmetals
c)
metalloids
d)
noble gases
9.
Beryllium is in group number______.
a)
Group 2
b)
Group 3
c)
Group 4
d)
Group 7
10.
How many Valance electrons does Iodine Have?
a)
6
b)
16
c)
7
d)
17
11.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
12.
An atom has 5 protons and 7 neutrons. What is the mass number of the atom?
a)
5
b)
7
c)
2
d)
12
13.
NH3 ---> N2 + H2
What are the products?
What are the products?
a)
N2 + H2
b)
N2
c)
H2
d)
NH3
14.
Na + MgF2 --> NaF + Mg
What are the reactants?
What are the reactants?
a)
Na + MgF2
b)
Na
c)
NaF + Mg
d)
NaF
15.
How many oxygen atoms are in this chemical formula?
a)
7 oxygen atoms
b)
4 oxygen atoms
c)
3 oxygen atoms
d)
1 oxygen atom
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