NEET Physics Nuclei Questions Solved


A radioactive nucleus with Z protons and N neutrons emits an α-particle, 2β-particles and 2 gamma rays. The number of protons and neutrons in the nucleus left after the decay respectively, are 
(a) Z – 3, N – 1                  (b) Z – 2, N – 2
(c) Z – 1, N – 3                  (d) Z, N – 4

(d) With emission of an α particle He24 mass number decreases by 4 unit and atomic number decrease by 2 units and with emission of 2β-1 particle atomic number increases by 2 units. So Z will remain same and N will become N-4.

Difficulty Level:

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