How have we found out the no. of protons and neutrons in the atomic nucleus of the elements in the periodic table?

Hello!

The number of protons in the nucleus of the atom is equal to the atomic number (Z).

The number of electrons in a?neutral?atom is equal to the number of protons.

The mass number of the atom (M) is equal to the sum of the number of protons and neutrons in the nucleus.

The number of neutrons is equal to the difference between the mass number of the atom (M) and the atomic number (Z).
And with the helps of cathode rays
Hope it helps
  • 1
Hello!

No. Of protons =atomic no.

A= Z+ N

N= A-Z

It is the formuls how we find no. of neutrons

Z-Atomic no
A-Mass no.
N- No.of neutrons

Hope it helps u
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