Question

Which part of an atom has the most of its mass?

Answer 1

The nucleus contains the protons and neutrons giving it the most mass

Answer 2

The nucleus of an atom contains most of the mass of atom.

Step-by-step explanation:

Atom has two parts:

• Nucleus
• Outer shells/energy levels.

Nucleus contains proton and neutrons while outer shell only contain electron.

Hence nucleus is havier part of atom.