Question

2.Electronic configuration of an atom X is (2,8,7). It combines with another atom Y having

electronic configuration (2,8,8,1):​

Answer 1

Answer:

2,8,7 is the X atom.

2,8,8,1 Is the atom Y.

So X is Chlorine.

And Y is potassium.

Cl+K➡️KCl.

It makes potassium chloride.