Question

How can we know the which block element in which group no​

Answer 1

Answer:-

The group of an element is predicted from number of electrons in the valence shell or/and penultimate shell(last but one i.e.(n-1) as follows.

For S- block element

• No. of the group=no. Of valence electron

For P- block element

• No.of the group=2+10+number of valence P electron.

For d- block element

• No of the group=2+number of(n-1)d electron

 

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