Question

An element X has mass number 4 and atomic number 2. Write the valency of this element . Will it react with other atoms of different elements

Answer 1

its helium,a noble gas. It willnot react with atoms of othr elements.

Answer 2

HI,


Here's the answer:-

The element is Helium.As we all know that helium is a noble gas, its valency is 0. So, it cannot react with atoms of other elements.

A new scientific discovery:--- Recently, scientists have found noble gases of higher masses and atomic number to react with O2 to form ions. Ex:- XeO6

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