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NEET 2019, Physics Q40: Radioactivity

NEET2019Paper 2019Physics
Q.

-particle consists of :

  1. A

    2 protons and 2 neutrons only

  2. B

    2 electrons, 2 protons and 2 neutrons

  3. C

    2 electrons and 4 protons only

  4. D

    2 protons only

Solution

-particle is nucleus of Helium which has two protons and two neutrons.

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