Question

please answer following question with explanation
'Atomic number of an element is considered to be a more appropriate parameter than its atomic mass for a chemist.' Take the example of the element X(atomic number 13) to justify this statement​

Answer 1

atomic number 13 is aluminium. =X
why a chemist is preferring atomic number because, it is a measure of number of protons and electrons in an atom and using the atomic number we can find the electronic configuration of an atom. and we can also find the number of electrons in the last shell. but whereas in the case of atomic mass which gives only the value of total mass of protons and neutrons in an atom and isotopes poses a problem in case of atomic mass