IGCSE Chemistry: Specimen Questions with Answers 32 - 32 of 240

Question number: 32

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Question

The number of valence electrons in the group is ________.

Choices

Choice (4) Response

a.

4

b.

2

c.

3

d.

1

Answer

b.

Explanation

Valence electrons are the electrons present in the outermost shell of an atom. The number of valence electrons is equal to the group number. Therefore the number of valence electrons of the elements in .

It can be observed from the following table that each element in 2nd group have 2 valence electrons.

element in 2<sup/>nd</sup> group have 2 valence

element in 2nd group have 2 valence

element in 2nd group have 2 valence electrons. Group 2 Electronic Configuration Number of valence electron