Question

Emus and rheas are the exceptions among birds

Answer 1

Answer:

Element be belong to 17th group so it has 17 electron in valence cell as it belong to the third period it has three shells-k I and M. Hence electronic configuration of b is k ,I , that is 2,8,7. A is a metal has it has a tendency to form electropositive iron by using its valence electron.

Explanation:

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