Question

an atom of an element x has 2 electrons in its N shell is ot metal or non metal
state its electronic configuration state the number of proton in x

Answer 1

Answer:

X is Helium. Helium is a nonmetal. Helium have no proton

Explanation:

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Answer 2

Answer:

Electronic configuration:- 2,8,8,2

no of protons :- 20

Explanation:

Bohr-Bury scheme :- 2n²

In K shell = 2× 1²

= 2

In L shell = 2 × 2²

= 8

In M shell = 2 × 3²

= 18

In N shell = 2 × 4 ²

= 32

But due to octet configuration rules a electrically netral atom ( p⁺ = e⁻ ) outermost shell can have 8 electrons

So ,electronic configuration = 2,8,8,2

No. of protons = 20