Question

explain why atomic number is more important atomic weight in determining chemical properteis?

Answer 1

Answer:

Explanation:

Atomic number is the number of electrons in an atom. Chemical properties depend upon the number of valency electrons and configuration. Hence why Atomic number is more important. The total weight of an atom is the atomic weight- doesn't determine the chemical properties.

Answer 2

Answer

Mass number is always an integer.

The atomic mass reported on a periodic table is the weighted average of all the naturally occuring isotopes.

Being an average it would be most unlikely to be a whole number.

The mass of an individual atom in atomic mass units is the mass relative to carbon-12.