How can we say that atomic number is equal to number of protons in an atom Any proof!!! - Science - Structure of the Atom

Question

How can we say that atomic number is equal to number of protons in
an atom??Any proof!!!

Kushal Kumar · Accepted Answer

Dear Student
Atomic number is equal to number of protons in any atom A neutral
atom has equal number of protons and electrons present it Now the
electrons can be lost or gained but not protons so electrons are
not used to determine atomic number Also there are some compounds
(called as isotopes) where the atomic number is same but mass
number is different In these substance the number of protons is
same Hence we can say that atomic number=number of protons
Regards

How can we say that atomic number is equal to number of protons in an atom??Any proof!!!