Which is correct statement about proton?

Options

A. It is nucleus of deuterium
B. It is an ionised hydrogen atom
C. It is an ionized hydrogen molecule
D. It is a hydrogen atom

Explanation

To determine the correct statement about a proton, let's analyze each option provided:

1. **Option A: It is a nucleus of deuterium.**
- Deuterium is an isotope of hydrogen that contains one proton and one neutron. Therefore, the nucleus of deuterium consists of one proton and one neutron. Since a proton is a single subatomic particle and not the entire nucleus, this statement is incorrect.

2. **Option B: It is an ionized hydrogen atom.**
- A hydrogen atom consists of one proton and one electron. When a hydrogen atom is ionized, it loses its electron, leaving behind just the proton. This means that an ionized hydrogen atom is indeed just a proton. Therefore, this statement is correct.

3. **Option C: It is an ionized hydrogen molecule.**
- A hydrogen molecule (H₂) consists of two hydrogen atoms, which means it contains two protons and two electrons. If this molecule is ionized, it would lose one electron, resulting in H₂⁺, which still contains two protons. Thus, this statement is incorrect as it does not refer to a single proton.

4. **Option D: It is a hydrogen atom.**
- A hydrogen atom consists of one proton and one electron. Since a proton is just one of the components of a hydrogen atom, this statement is also incorrect.

Based on the analysis, the correct statement about a proton is:

**Answer: It is an ionized hydrogen atom.**