Question 1
Compare the properties of electrons, protons and neutrons?

$\begin{array}{ccc}\text{Electrons}& \text{Protons}& \text{Neutrons}\\ \text{Electrons are present outside the nucleus of an atom}& \text{Protons are present in the nucleus of an atom.}& \text{Neutrons are present in the nucleus of an atom}.\\ \text{Electrons are negatively charged particles}& \text{Protons are positively charged particles}& \text{Neutrons have a neutral charge}\\ \text{The mass of the electron is said to be negligible}& \text{The mass of a proton is approximately 2000 times the mass of an electron}.& \text{The mass of neutron is almost equal to the mass of the proton.}\end{array}$