An element X has its first 2 shells completely filled and the 3rd shell has same number of electrons as - Science - Structure of the Atom

Question

An element X has its first 2 shells completely filled and the 3rd
shell has same number of electrons as in the first shell
a) ? ? ? ?Identify the element X and give its atomic number
b)? ? ? Derive the valency of X
c) ? ? ? When it forms its ion, it will have same number of
electrons as present in neutral atom of Y, name the element Y

Chirag Gupta · Accepted Answer