Atom consists of electrons, protons and neutrons. If the mass attributed to neutron is halved and that attributed to the electrons is doubled, the atomic mass of would be approximately

Question

Atom consists of electrons, protons and neutrons. If the mass attributed to neutron is halved and that attributed to the electrons is doubled, the atomic mass of  would be approximately

Canvas Classes · Accepted Answer

C has 6 protons, 6 neutrons, 6 electrons.

Original mass  6 + 6 = 12 u (electron mass negligible).

New scenario:
- 6 neutrons at half mass:  u
- 6 protons unchanged: 6 u
- Electrons still negligible

New mass  u

Reduction

Answer: Option (d) — Reduced by 25%

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