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WorksheetsChemical formula
Total questions: 20
Worksheet time: 39mins
Name
Class
Date
1.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
2.
How many atoms of carbon (C) are in C6H12O6?
a)
3
b)
6
c)
12
d)
24
3.
Element or compound?
H2O
H2O
a)
element
b)
compound
4.
Which of the following is a compound?
a)
Co
b)
O2
c)
C
d)
CO2
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.
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
7.
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
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.
The blue atoms are called
a)
metals
b)
nonmetals
c)
metalloids
d)
noble gases
11.
The atoms along the staircase are called
a)
metals
b)
nonmetals
c)
metalloids
d)
noble gases
12.
The substances at the beginning of a chemical equation are called the ____
a)
product
b)
yield
c)
chemical symbol
d)
reactants
13.
In this image, the symbols to the right of the arrow (in black) are called the_______.
a)
Products
b)
Reactants
c)
Subscripts
d)
Coefficients
14.
Na + MgF2 --> NaF + Mg
What are the reactants?
What are the reactants?
a)
Na + MgF2
b)
Na
c)
NaF + Mg
d)
NaF
15.
NH3 ---> N2 + H2
What are the products?
What are the products?
a)
N2 + H2
b)
N2
c)
H2
d)
NH3
16.
All of the following are chemical changes except
a)
iron rusting
b)
water evaporating
c)
wood burning
d)
food rotting
17.
Coal contains carbon and other elements. Carbon dioxide forms when coal burns in the presence of oxygen. Which of these is the best evidence that a chemical reaction occurs when coal burns?
a)
The shape of the coal changes
b)
Oxygen is present
c)
A new substance is produced
d)
Coal is made up of more than one element
18.
What is the chemical formula of sodium sulfate?
a)
SSO4
b)
SoSO4
c)
NaSO4
d)
Na2SO4
19.
What is the chemical formula of Magnesium chloride?
a)
MgCl
b)
MgCl2
c)
MgC
d)
MgC2
20.
What is the formula of Copper (II) oxide?
a)
CUO
b)
CuO
c)
CuO2
d)
Cu2O
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