Question

1. explain the difference between the mass of a proton and the mass of an electron. why is the nucleus responsible for nearly all of the atoms mass?

Explanation:

The nucleus contains protons and neutrons which have much greater mass than electrons. Protons are massive particles found in the nucleus, while electrons are extremely light and orbit the nucleus. The mass of a proton is approximately 1836 times the mass of an electron. The nucleus is responsible for nearly all of the atom's mass because protons and neutrons, which make up the nucleus, are far more massive than electrons.

Answer:

The nucleus contains protons and neutrons which are much more massive than electrons, so it is responsible for nearly all of the atom's mass. A proton is much more massive than an electron because protons have a significant amount of mass due to their composition of quarks, while electrons are fundamental particles with very little mass.