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An alpha-particle is identical with...

An `alpha`-particle is identical with

A

Proton

B

Neutron

C

Helium nucleus

D

Electron.

Text Solution

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The correct Answer is:
To solve the question "An alpha-particle is identical with", we need to analyze what an alpha particle is and compare it to other particles. ### Step-by-Step Solution: 1. **Understanding Alpha Particles**: - An alpha particle is a type of subatomic particle that consists of 2 protons and 2 neutrons. 2. **Identifying the Composition**: - Since an alpha particle has 2 protons and 2 neutrons, it can be represented as a helium nucleus. 3. **Helium Nucleus**: - The helium nucleus is denoted as \( \text{He} \) and has an atomic number of 2 (which indicates the number of protons) and a mass number of 4 (which is the total number of protons and neutrons). 4. **Comparing with Other Options**: - Let's consider the other options: - **Proton**: This is a single particle with a charge of +1 and does not match the composition of an alpha particle. - **Neutron**: This is also a single particle with no charge, and like the proton, does not match the composition of an alpha particle. - **Electron**: This is a negatively charged particle and does not have the same composition as an alpha particle. 5. **Conclusion**: - The only option that matches the composition of an alpha particle (2 protons and 2 neutrons) is the helium nucleus. ### Final Answer: An alpha particle is identical with a helium nucleus. ---
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