An atom of anelement 'X' has three completely filled shell . Theratio of electrons in 1 and 4 shells is 1:1. Find the atomic number of 'X' . Alsowrite the formulae of its bicarbonate , chromate and phosphide.

An atom of anelement 'X' has three completely filled shell . Theratio

1.	An atom of anelement 'X' has three completely filled shell . Theratio of electrons in 1 and 4 shells is 1:1. Find the atomic number of 'X' . Alsowrite the formulae of its bicarbonate , chromate and phosphide.
Answer» Solution :The electronic arrangement of X must be 2 , 8 , 18 , 2 So the ATOMIC NUMBER of X ahould br 30 . The element X is Zn which can form`Zn^(+2)`ion by LOSING 2 electrons from N shell.