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Worksheetsvalency class 7
Total questions: 10
Worksheet time: 7mins
Name
Class
Date
1.
What is the tiniest particle in the entire universe?
a)
cells
b)
gases
c)
atoms
d)
liquids
2.
Is sugar (C12H22O11) an element or a compound?
a)
Element
b)
Compound
3.
This picture represents which of the following?
a)
element
b)
compound
4.
What are valence electrons?
a)
The total number of electrons in an atom
b)
The number of electrons in the outermost shell
c)
The number of electrons in the second shell
d)
The number of protons in the outermost shell
5.
a)
2
b)
8
c)
3
d)
13
6.
How many valence electrons does carbon have?
a)
4
b)
5
c)
6
d)
7
7.
How many Valance electrons does Iodine Have?
a)
6
b)
16
c)
7
d)
17
8.
a)
2
b)
3
c)
5
9.
What is the valency of Calcium (Ca)
a)
1
b)
2
c)
3
d)
4
10.
What is the formula of the compound formed between magnesium and oxygen?
a)
MgO
b)
Mg2O2
c)
MgO2
d)
Mg2O
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