Question

The heaviest subatomic particle is:
(A) Neutron
(B) Positron
(C) Electron
(D) Proton

Answer 1

The particles that are found in the structure of the atom and they are smaller in size than atoms, are called subatomic particles. Subatomic particles can be elementary or composite. The heaviest subatomic particle is neutral in charge.

Complete step by step solution:
All the particles given in the options are subatomic particles.
We know that weight of electron is $9.11\times {{10}^{-28}}g$
We also know that positron is the electron with a positive charge. Means it has a positive charge and weighs the same as an electron.
Weights of proton and neutron are nearly the same. The heaviest subatomic particle is found in the nucleus of the atom and it does not carry any charge.
Weight of a proton is $1.672\times {{10}^{-24}}g$ and weight of a neutron is $1.674\times {{10}^{-24}}g$.
So, based on given details we can conclude that neutron is the heaviest subatomic particle amongst proton, neutron, positron and neutron.

So, the correct answer is (A) Neutron.

Additional information:
-There are many subatomic particles found by scientists.
-Protons and neutrons have a very narrow margin of difference between their weights in which the neutron is heavier than the proton.
-Neutrons do not carry a charge, while electrons are negatively charged and protons are positively charged.

Note: Do not consider positrons as protons, as they are alike or carry a positive charge, in fact, they are different and their weights are also different. Remember that as the power of 10 is in negative numbers, the value decreases with an increase in power of 10.