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Subjects
Science State Board
Class 7
Atomic structure
The structure and types of atom
7.
Valency based exercise
Exercise condition:
4
m.
1
.
__________ takes part in a chemical reaction.
Electrons with less energy
Valence electrons
Inner electrons
2
.
The outermost electron in the sodium atom is 1. Then, the valency is __________
10
1
9
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