Question

Why is atomic number is more important than atomic weight in predicting the chemical properties of elements?​

Answer 1

because the atomic number contains the no of electrons or the no of protons present in an atom.

                                             hope it helps.............

Answer 2

Because all elements have a unique atomic number but two or more elements can have same atomic weight..

Also, because chemical properties depends on electrons numbers and electrons no. Depend on atomic no.