Question

(i) Find out the number of calcium atoms present in 50 g calcium carbonate
(ii) Explain the observations of Rutherford’s experiment

Answer 1

Explanation:

(I) CaCO3 = 1(Ca) + 1(C) + 3(O)

= 1+1+3

= 5

:. there aare 5 atoms in calcium carbonate

(ll) From the observations of Rutherford's experiment it was concluded that positively charged particles and most of an atom was concentrated in a very small volume known as nucleusElectrons surrounding the nucleus of an atom revolve around it with very high speed.

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