Question

An element x has mass no. 4 and atomic number 2 write the valency of this element will it React with other atom of different elements.

Answer 1

Hi friend,

Here is your answer,
_____________________________________________________________

Mass number = 4
Atomic number = 2
X is Helium.
It has 0 valency and it will not react with any other atom because it has its outer shell filled.
_____________________________________________________________

★★★★ HOPE THIS HELPS YOU ★★★★
★★★★ PLS MARK ME AS BRAINLIEST ★★★★