MCQ
Experimental evidence for the existence of the atomic nucleus comes from
- AMillikan's oil drop experiment
- BAtomic emission spectroscopy
- CThe magnetic bending of cathode rays
- ✓Alpha scattering by a thin metal foil
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$PC{l_5}(g) \rightleftharpoons PC{l_3}(g) + C{l_2}(g)$ is