Chapter 4: Structure of the Atom

Q&A -Ask Doubts and Get Answers

Q
Structure of Atom

Question:

Rutherford’s alpha-particle scattering experiment was responsible for the discovery of:

(a) Atomic Nucleus

(b) Electron

(c) Proton

(d) Neutron

Answer:

Rutherford’s Model of an Atom:

The Rutherford performed the Gold foil experiment in which the fast-moving alpha-particles were made fall on the gold foil. Some of the alpha particles deflect at higher angles while some deflect at smaller angles and some went undeflected.

According to Rutherford’s model, the atom contains a nucleus at the center which is heavy and positively charged. The size of the nucleus is very small as compared to the size of the atom. The electron is a negatively charged particle that revolves around the nucleus. So, Rutherford discovered the nucleus.

Hence the correct answer is (a) Atomic Nucleus.


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