Question

an element E on combining with oxygen produce an oxide E203, which is electrically conducting.now answer - (a) how many electron must be there in outermost shell of the element E? ( b) to which group and period of the periodic table does the element belong?​

Answer 1

Answer:

(a) Ans- I think elements should be Al (Al2O3)

Explanation:

And electron in outermost shell will be 1 because of its electronic configuration -

[Ne] 3s² 3p¹

(b) Ans- period of elements is 3 and Group is 13

Answer 2

Answer:

a) 3

Explanation:

in outermost she'll that's known as valency should be 3

Because when we make a formula we exchange the valency and hence the valency will be 3