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Question

If an atom has electronic configuration 1s22s22p63s23p63d104s2 it will be placed in?


A

Second group

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B

Third group

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C

Fifth group

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D

Sixth group

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Solution

The correct option is A

Second group


To find the group of the element always look at the last orbital and the number of electrons in it.

1s22s22p63s23p63d104s2 this element has 2 electrons in the outermost s-orbital.

So, it belongs to the s-block and also the 2nd group in the periodic table.


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