Question

atomic number is more fundamental property of an element then its atomic mass , Give reason.​

Answer 1

you have seen many scientists tried to arrange elements earlier on the basis of atomic mass , but they all have some limitations, even mendeleev periodic table could not explained the position of isotopes ,etc..as he arranged elements on the basis of atomic mass

so moseley, proposed that atomic number is more fundamental property of elements in periodic classification.

now on this property all the limitations are removed , also this arrange shows perfect periodicity. .

Answer 2

Answer:

Explanation:

(i) The atomic number of an element indicates the

number of protons in the nucleus or the number

of electrons in the atom.

(ii) All the atoms of an element have the same atomic

number.

(iii) The number of electrons present in the outermost

shell of an atom is responsible for the formation

of compounds either by sharing, accepting or

donating electrons.

(iv) The chemical properties of an element are decided

by its atomic numbers. Hence, atomic number is a

more fundamental property of an element than its

atomic mass.