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Worksheets8th grade Chemical Formulas
Total questions: 15
Worksheet time: 14mins
Name
Class
Date
1.
The one or two letters used to represent elements
a)
Yield sign
b)
Coefficient
c)
Symbol
d)
Subscript
2.
Element or compound?
H2O
H2O
a)
element
b)
compound
3.
Element or compound?
O2
O2
a)
Element
b)
Compound
4.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
5.
A physical change is?
a)
It changes the object into something different
b)
Objects or substances undergo a change that does not change their chemical composition
c)
it is just like a chemical reaction
d)
Paper burning
6.
A chemical change is?
a)
a shoe lace cut in half
b)
doesn't change anything
c)
changes the look of an object
d)
change that results in the formation of new chemical substances
7.
The smallest physical unit of an element or compound (O2 and H2O are both examples of ONE of these)
a)
Physical change
b)
Chemical Symbol
c)
Yield Sign
d)
Molecule
8.
The arrow symbol used in a chemical equation
a)
Yield sign
b)
Subscript
c)
Coefficient
d)
Chemical formula
9.
A way to show the number and type of elements (atoms) in a molecule or compound with a combination of symbols and numbers.
a)
Molecule
b)
Chemical formula
c)
Physical change
d)
Coefficient
10.
The small number that is written below the symbol and shows how many atoms of each element is present.
a)
Compound
b)
Molecule
c)
Coefficient
d)
Subscript
11.
The large number written in front of a chemical formula. It shows the number of molecules.
a)
Molecule
b)
Compound
c)
Coeffiecient
d)
Subscript
12.
How many Hydrogen atoms are in H2O?
a)
zero
b)
one
c)
two
d)
three
13.
How many atoms of carbon (C) are in C6H12O6?
a)
3
b)
6
c)
12
d)
24
14.
Which of the following is a compound?
a)
Co
b)
O2
c)
C
d)
CO2
15.
Which of the following is NOT an element?
a)
H2O
b)
H2
c)
O2
d)
Au
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