Question

Which of the following is/are subatomic particles?
(A) Proton
(B) Positron
(C) Neutrino
(D) All the above

Answer 1

In nature, the particles that have a smaller size as compared to the atoms are known as the subatomic particles. The subatomic particles take part during the nuclear reaction and emission. One subatomic particle can be emitted by the other specific subatomic particle.

Complete step-by-step solution:
- Proton: Atoms of a molecule consist of three elementary particles that are responsible to form an atom. It is denoted by $P$ and contains positive charge equal to the charge on one elementary particle electron. As it is found in atoms and small in size as compared to the atom, this elementary particle is also termed as subatomic particle.
- Positron: The positron particle is formed during the beta plus decay occurs in an atom due to excess of protons in an atom that makes the atoms unstable. It is denoted by ${e^ + }$ or ${\beta ^ + }$ and contains positive charge equal to the charge on one elementary particle electron and also it has the same amount of mass as an electron. As it is part of proton and small in size as compared to the atom, this elementary particle is also termed as subatomic particle.
- Neutrino: When the beta decay occurs in an atom due to unstable atoms and this instability occurs due to the excess of proton particles in an atom, then a proton emits a positron, neutron and a neutrino. It has zero electrical charges that make it neutral. As it is part of proton and small in size as compared to the atom, this elementary particle is also termed as a subatomic particle.
Therefore, all the given particles are subatomic particles and
the correct option is (D).

Note: The Bohr model provides the information about the three elementary particles that are founded in an atom and also it tells that atoms consist of its mass mainly in the nucleus and the electrons move around the nucleus.