Question

can someone tell me the formula to find atomic weight?​

Answer 1

Answer:

Explanation:

Atomic weight: The sum of mass number of proton and mass number of neutron is called atomic weight or atomic mass number (A). Z = 19 and A = 39 as per atomic weight definition. Isotopes: Atoms of the same element contains different number of neutrons, are called isotopes.

Answer 2

atomic weight = no of moles × molecular mass