Question

A B and C are three elements having their atomic number equal to 2 10 and 5 respectively which of these elements belong to the same period which of these element belong to the same group

Answer 1

electronic configuration
element A- 2
element B-2,8
element C-2,3
Thus element B and C have same number of shells that is two. Thus ,they belong to same group.

Answer 2

Answer:

electronic configuration

element A- 2

element B-2,8

element C-2,3

Thus element B and C have same number of shells that is two. Thus ,they belong to same group.

Explanation:

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