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Q.

Which of the following is Lightest particle of the atom?

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a

Proton

b

Neutron

c

Electron

d

None of these

answer is B.

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Detailed Solution

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Electron is the Lightest particle of the atom. The electron was the first subatomic particle which is discovered by J.J. Thomson in 1897. It has mass of 9.1×10-28 grams.

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