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Question: Answered & Verified by Expert
Alpha rays emitted from a radioactive substance are
PhysicsNuclear PhysicsTS EAMCETTS EAMCET 2020 (10 Sep Shift 1)
Options:
  • A negatively charged particles
  • B doubly ionised helium atoms
  • C ionised hydrogen nuclei
  • D uncharged particles
Solution:
1461 Upvotes Verified Answer
The correct answer is: doubly ionised helium atoms
$\alpha$-rays are a bunch of particles consisting of 2 neutrons and 2 protons. Hence, a $\alpha$-particle is a doubly ionised helium-atom.

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