`alpha` particle consists of

Options

A. 2 protons and 2 neutrons only
B. 2 electons , 2protons and 2 neutrons
C. 2 electons and 4 protons only
D. 2 protons only

Explanation

To answer the question about what an alpha particle consists of, we can break down the information step by step:

### Step 1: Understanding the Composition of an Alpha Particle
An alpha particle is essentially a helium nucleus. It is important to know that it is a type of particle that is emitted during radioactive decay.

### Step 2: Identifying the Atomic Structure of Helium
Helium has an atomic number of 2, which means it has 2 protons. The mass number of helium is 4, which includes both protons and neutrons.

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