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WorksheetsAtomic structure
Total questions: 10
Worksheet time: 7mins
Name
Class
Date
1.
Matter is built up of
a)
Solid liquid gas
b)
Atoms, Molecules , Radicals
c)
Plastic
d)
Small particles
2.
A molecule of an element is
a)
Water
b)
Chlorine
c)
Ammonia
3.
Who done the discovery of "electrons"
a)
J.J Thomas
b)
Rutherford
4.
Radicals are of how many types
(a)
5.
In Periodic Table eighteen vertical columns are called
a)
Group
b)
Periods
6.
Helium symbol
a)
He
b)
H
c)
Hi
7.
Sodium symbol
a)
S
b)
Si
c)
Na
d)
Ne
e)
So
8.
Oxygen atomic number
a)
5
b)
8
c)
7
d)
12
e)
28
9.
Valency of boron
a)
±1
b)
+1
c)
1-
d)
—_1
10.
What is a subatomic particle with a positive charge that is in the nucleus of an atom?
a)
neutron
b)
proton
c)
electron
d)
valence electron
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