Question

an atom has complete Kand L shell. Isthis an atom of a metal , nonmetal or noble gas? Justify

Answer 1

An atom has a complete K and L shell, hence it is a noble gas as in its atomic state its valence shell is completely full.

Answer 2

Answer: Option (c) is the correct answer.

Explanation:

An atom in neutral state which has completely filled K and L shell is a noble gas.

We know that in order to completely fill the shell there has to be 2 electrons in K shell and 8 electrons in L shell.

For example, atomic number of neon is 10 and therefore, its electronic distribution is 2 electrons in K shell and 8 electrons in L shell.

Whereas metals are electron rich species and non-metals are electron deficient species.

Thus, we can conclude that an atom of noble gas has complete K and L shell.