Question

gallium-64 how many protons neutrons and electrons are there

Answer 1

how do I do this step bt step

Answer 2

This is an isotope meaning this element has a different atomic mass than the one in the periodic table.
Isotope notation is:
element name-atomic mass

So element name is gallium
and atomic mass is 64

Atomic number of gallium=number of protons gallium have
Since this is a neutral element, then the number of electron is same as the number of proton
Number of neutrons in gallium+number of protons in gallium=atomic mass of this isotope.