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Question

The electronic configuration of an element is 3d54s1. Its group number is:

A
1
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B
4
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C
5
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D
6
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Solution

The correct option is D 6
From the outer electronic configuration, it is a d- block element.

For a d block element,
group number = number of (n -1) d electrons + number of ns electrons
=5+1=6

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