# Binding energy

## Homework Statement

What is the binding energy of 12C ? (the 12 is meant to be the nucleon number of C)

E=mc^2

## The Attempt at a Solution

I am not sure how to calculate the mass defect. Do i take into consideration of the protons, electrons and neutrons?

Binding energy= (mass of the total no of protons and the nucleus - mass of the atom itself)/c^2.

Binding energy= (mass of the total no of protons and the nucleus - mass of the atom itself)/c^2.

Thanks but why is electrons not involved here?

Thanks but why is electrons not involved here?
It depends on whether the question is referring to the atom or nucleus.
The binding energy of a nucleus would just involve the nucleons, whereas the binding energy of the atom would involve the electrons as well.

It depends on whether the question is referring to the atom or nucleus.
The binding energy of a nucleus would just involve the nucleons, whereas the binding energy of the atom would involve the electrons as well.

thanks and in this case, how do i know if the question is referring to the carbon nucleus or the carbon atoms?