Question

Explain why atomic number is more important than atomic weight in determining chemical properties

Answer 1

Atomic number is Number of electrons in an atom.Now, Most of the chemical properties depend upon its valency electrons and Electronic configuration.So, atomic number is more important to a chemist, than its relative atomic mass.

Hope this will help u..

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Answer 2

atomic number is more important than atomic mass (weight) because it's the most basic thing. without atomic number, everything will be complicated. like electronic configuration, calculating valency, valence electrons etc.

And the main thing is, we can calculate the atomic mass by atomic number (in most cases) since atomic number is the number of electrons present in the atom and we know that electrons = protons. and neutrons are too equal to the number of protons and electrons (not always but 80%).

by atomic number, we can calculate the valency of an atom which is very very important. valency is much more important than atomic number but without atomic number, we can't calculate valency of an atom :p

atomic mass is also important.. but not as much as atomic number is.