Question

Name the three constituents of an atom and state their mass and charge of each. How are they distributed in an atom?

Answer 1

Three constituents of an atom are:

Electrons: mass is `1/1840` of 1.6 × 10^-27 kg, negative charge (-1.6 × 10^-19C).

Neutron: mass is 1.6 × 10^-27 kg, charge is zero.

Protons: mass is 1.6 × 10^-27 kg, positive charge is (+1.6 × 10^-19 C).

Or Proton and Neutrons have mass each equal to 1 Hydrogen atom and electron has mass `1/1840"th"` of 1 hydrogen atom.