Home Chemistry Structure of Atom Atomic Number, Mass Number, Atomic Species In the nucleus of there are
Chemistry Structure of Atom Atomic Number, Mass Number, Atomic Species Single Correct MCQ
Published on: August 13, 2026

In the nucleus of there are

A
40 protons and 20 electrons
B
20 protons and 40 electrons
C
20 protons and 20 neutrons
D
20 protons and 40 neutrons

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Text Solution

Verified by Experts
The correct answer is:
C

20, mass no. ( A ) = 40

A – P =

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