what is alpha particles
Answers
Answer:
A very small piece of matter with a positive electric charge passing through it, that is produced in a nuclear reaction.
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Explanation:
Alpha particle
Alpha particle is a positively charged particle having 2 units of positive charge and 4 units of mass.
It is actually helium ion, He2+.
Rutherford’s alpha particles scattering experiment led to the discovery of small positively charged nucleus in the atom which contained protons and neutrons.
When fast moving alpha particles are allowed to strike a thin gold foil of about thousand atoms thick in vacuum, it is found that:-
Most of the fast moving alpha particles passed straight through gold foil.
Some of the alpha particles were deflected by small angles.
About 1 out of every 12000 particles appeared to rebound.