Atomic mass when number of neutrons and electrons alter, Chemistry

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Atoms consists of protons, neutrons and electrons. If the mass of neutrons and electrons were made half and two  times  respectively to their actual masses, then the atomic mass of 6C12:

(1) Will remain approximately the same

(2) Will become approximately two  times

(3) Will remain approximately half

(4) Will be reduced by 25%

Ans:  Will be reduced by 25%


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