Question

$\mathrm{\alpha }-$Ray scattering experiment led to the discovery of

• A. Nucleus
• B. Neutrons
• C. Nucleons
• D. Nuclear particles

Answer 1

The correct option is A

Nucleus

• Rutherford performed a $\mathrm{\alpha }-$Ray scattering experiment in which he observed that certain alpha particles are deflected at small and large angles indicating that the atom has a 'center of positive charge' that repels positively charged alpha particles and deflects them away from their original path.
• The nucleus is the center of the positive charge in an atom.
• The presence of a positively charged nucleus in the atom is demonstrated by the scattering of alpha particles by a thin gold foil.
• Hence, the $\mathrm{\alpha }-$Ray scattering experiment led to the discovery of the Nucleus.
• Hence option A is correct.