Alpha rays consist of a stream of

Options :
  1. hydrogen ion
  2. electrons
  3. neutrons
  4. helium ion
Answer and Explanation :-

Answer: Option 4

Explanation:

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We cast a shadow on something wherever we stand, and it is no good moving from place to place to save things because the shadow always follows. Choose a place where you won't do harm - yes, choose a place where you won't do very much harm, and stand in it for all you are worth, facing the sunshine.
-E.M. Forster A Room with a View