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Question

Elements of which period, among the following, will not have f-subshell in its electronic configuration?

A
5th period elements
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B
4th period elements
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C
3rd period elements
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D
7th period elements
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Solution

The correct option is C 3rd period elements
5th, 4th and 7th period elements of periodic table have f - subshells in their electronic configuration due to their high atomic number and thus have high number of electrons in them. 3rd period elements do not have f - orbitals as their electrons are completely exhausted in filling upto d orbitals.

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