The physical and chemical properties of the elements denpend upton their atomic number rather than atomic masses because

Options

A. an atom consists of a nucleus surrounded by electrons
B. atomic mass is a nuclear property and depends upon the number of protons and neutrons in the nucleus while atomic number inplies the number of electron in the extranculear part
C. the chemical properties of the elements depend upon the interaction between the atom and the reagent. The nucleus is deep inside the taom, shielded by ectrons in the extranuclear part while electrons are exposed to the reagent
D. Both`(1)`and`(2)`

Answer

C

Explanation

The physical and chemical properties depends upon the number of electrons and their electronic configuration.