Question

It is saying that we consider atomic no which is no of proton as a fundamental property not atomic mass. Take eg of aluminium

Answer 1

Answer:

ALUMINIUM ATOMIC NO.-13

Explanation:

aluminium's electronic configuration is[2,8,3]

this helps in defining aluminium atom's valency,electropositivity,valence electrons etc

the atomic number which ressembles to the number of protons in the nucleus is more fundamental that atomic number and it is revealed and researches by Henry Moseley