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WorksheetsMatter and Chemical Formulae
Total questions: 10
Worksheet time: 5mins
Name
Class
Date
1.
The smallest unit of matter which can exist independently is called
a)
an atom
b)
a molecule
c)
a compound
d)
an element
2.
The total number of known elements are
a)
118
b)
119
c)
120
d)
108
3.
The chemical symbol for calcium is
a)
Ca
b)
Cl
c)
Cu
d)
Ce
4.
The valency of hydroxide (OH) radical is
a)
1
b)
2
c)
3
d)
4
5.
The number of atoms present in a molecule is called its
a)
atomicity
b)
valency
c)
symbol
d)
compound
6.
An (a) is a substance made of only one kind of atom.
7.
The properties of a (a) are different from its constituent elements.
8.
(a) is anything that has mass and occupies space.
9.
The abbreviations used to represent elements are called (a)
10.
The arrow symbol in a chemical equation indicates the (a) of the chemical reaction.
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