The deflection of positively charged alpha particles at large angles, and the reflection of a few back towards the source, indicated that they were encountering a strong positive charge concentrated in a very small volume within the atom, which was termed the nucleus.
Scattering of α-particles by a thin gold foil suggests the presence of
Asked in UPSC CDS 1 2020 · Topic: Nuclear Physics (Basic properties of nuclei: size, shape, charge, mass, spin, magnetic dipole and electric quadrupole moments.)
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Answer: C. positively charged nucleus at the centre of an atom
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