Question

2) A-Z equals to the number of ........ in an atom​

Answer 1

Neutrons

In atom symbol X is the atom of the element , A is the atomic mass i.e. total no. of protons and neutrons in the nucleus of the atom, and Z is the atomic number i.e. the no. of protons....

so, A-Z = Neutrons+Protons - Protons

==> A-Z = Neutrons...

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