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Question

M3+ ion has its electronic configuration as [Ar] 3d104s2. The element lies in:

A
s-block
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B
p-block
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C
d-block
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D
f-block
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Solution

The correct option is B p-block
The element 'M' has three more electrons than M3+. Electronic configuration of M will be [Ar] 3d104s24p3.
Since the last electron enters into the p subshell, the element belongs to the p-block in the periodic table.

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