WorksheetsChemistry grade 7
Total questions: 7
Worksheet time: 4mins
Name
Class
Date
1.
Diffusion can only occur in________.
a)
solids, liquids and gases
b)
solids and liquids
c)
liquids and gases
d)
gases and solids
2.
The 7th Element on the periodic table
a)
Helium
b)
Nitrogen
c)
Oxygen
d)
Sulphur
3.
What is the chemical symbol for Silicon?
a)
S
b)
Sr
c)
Si
d)
SO
4.
What is the proper name for CaCl2?
a)
Calcium dichloride
b)
Monocalcium dichloride
c)
Calcium chloride
d)
Calcium chlorine
5.
Which of these is NOT a sign that a chemical change has occurred?
a)
A loss of transparency
b)
An unexpected color change
c)
A temperature change
d)
The formation of a precipitate
6.
The atomic number of oxygen is
a)
8
b)
15.9994
c)
16
d)
O
7.
Electrons are positively / negatively charge. (a) .
100 %
