Question

(9) () Why the element 'He is placed in p-block along with noble gas
elements but not in s block?​

Answer 1

Answer:

Hii

Explanation:

Yes He should also be placed with S- block elements because its outermost shell also contain 1 electron like S- block elements . He is also electro positive like S- block elements .

Since it is a gas , So on the basis of gaseous properties it has been placed in group 18. along with noble gases .

This is also the limitation of Modern Periodic table

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