Alpha particle is the nucleus of an atom of
(A) Lithium
(B) Hydrogen
(C) Helium
(D) Oxygen
Question Asked : SSC Graduate Level Tier-I Exam 2013
Explanation : Alpha particles (2He4) consist of two protons and two neutrons bound together into a particle identical to a helium nucleus, which is generally produced in the process of alpha decay. These particles travelling with 10% of velocity of light cause ionization.
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