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Rutherford's Model

Identify the ...

Question

Identify the correct option amongst the following:
An $α$ particle is :

A

a hydrogen molecule

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B

a helium nucleus

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C

an electron

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D

a proton

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Solution

The correct option is B a helium nucleus
An alpha particle is a nucleus of atom of helium and they don't have any electrons around them. They consist of two protons and two neutrons. Alpha particles are type of ionizing radiation ejected by the nuclei of some unstable atoms.

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