Question: The lightest particle in an atom is an electron, whose rest mass is 9.1 10-31 kg. The energy equivalent of this mass is approximately

The lightest particle in an atom is an electron, whose rest mass is 9.1 × 10-31 kg. The energy equivalent of this mass is approximately

a. 10-13 J

b. 10-15 J

c. 3 × 10-23 J

d. 10-47 J

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