Question

Which is the correct statement about proton?

• A. Proton is nucleus of deuterium
• B. Proton is ionized hydrogen molecule
• C. Proton is ionized hydrogen atom
• D. Proton is $\alpha$-particle

Answer 1

The correct option is C

Proton is ionized hydrogen atom

What do we know about proton & Hydrogen?

$\to$ Proton is positively charged particle.

$\to$ Hydrogen is an element with one proton and one electron.

$\to$ If we ionize hydrogen atom, it will lose one electron and only one proton will be left.

$\Rightarrow$ Therefore, proton is ionized hydrogen atom.

$\Rightarrow$ Why is it not ionized hydrogen molecule. Because ionized hydrogen molecule will be

${H_2}^{+}$$\to$1 electron, 2 protons

$\Rightarrow$ Deuterium $\to$ Mass no. = 2, Atomic Number = 1 Nucleus of Deuterium $\to$ 1 proton + 1 neutron

$\Rightarrow$ $\alpha$ - particle is the nucleus of Helium which carry 2 protons and 2 neutrons.