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Experimental evidence for the existence of the atomic nucleus comes from:
(1) Millikan's oil drop experiment
(2) Atomic emission spectroscopy
(3) The magnetic bending of cathode rays
(4) Alpha scattering by a thin metal foil
Ans: Alpha scattering by a thin metal foil
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An element L has 9 protons and valency 1. Another element M has valency 3 and 5. What is the difference in the number of electrons in L and M ?
conclusion of the topic?
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