Which of the following sub atomic particle has highest mass?
A
Neutron
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B
Positron
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C
Electron
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D
Proton
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Solution
The correct option is C Neutron Neutron is heaviest among all subatomic particles with a mass of 1.0087 amu while proton has a mass of 1.0073 amu. Positron and electron both have a mass of 0.00055 amu.