Questions Related to Structure of Atom
Updated on November 11, 2025 | By Learnzy Academy
Q21. How many times is a proton heavier than an electron?
A proton is about 1836 times heavier than an electron. The mass of a proton is much greater than that of an electron.
Q22. Which is heavier, neutron or proton?
A neutron is slightly heavier than a proton.
The mass of a proton is approximately 1.672 × 10⁻²⁷ kg, while the mass of a neutron is about 1.675 × 10⁻²⁷ kg.
Although their masses are almost the same, the neutron has a very small additional mass.
Both are found in the nucleus of an atom, but since the neutron has no charge and a slightly greater mass, it is considered heavier than the proton.
Q23. Name the scientist and his experiment which proved that the nucleus of an atom is positively charged.
The scientist was Ernest Rutherford. He performed the Alpha Particle Scattering Experiment, which showed that the nucleus of an atom is small, dense, and positively charged.