JEE CHEMISTRY MCQ: STRUCTURE OF ATOM

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The electron is

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Correct option: B

\beta

-ray particle

Option B (

\beta

-ray particle) is correct because an electron is a type of beta particle, which is a high-energy, high-speed electron or positron emitted during radioactive decay.

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n^{\text {th }}

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in magnesium atom is The nucleus and an atom can be assumed to be spherical. The radius of the nucleus of mass no. A is given by

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. The atomic radius of atom is 1 Å. If the mass no. is 64, the fraction of the atomic volume that is occupied by nucleus is: