Question

Mass number of all the elements present in periodic table

Answer 1

Explanation:

hope it'll help you.

Mark as brainly ans...if you feel.

Answer 2

THE EASIEST WAY TO FIND THE ATOMIC MASS OF ALL ELEMENTS IS = ATOMIC NUMBER × 2

BUT IN SOME CASES RESULT WILL BE UP OR DOWN BUT THIS IS A EASIEST WAY.

LIKE Na

ATOMIC NO. 11

MASS 21.2. APPROX.

HOPE YOU UNDERSTAND.