Question

The first model of an atom was given by

• A. N.Bohr
• B. E.Goldstein
• C. Rutherford
• D. J.J Thomson

Answer 1

The correct option is D

J.J Thomson

The correct option is (D).

Explanation of the correct option:

1. J.J Thomson proposed the first model of an atom in 1899.
2. Thomson's model of atom resembles that of watermelon or Christmas pudding in which electrons are embedded in a positive sphere just like the seeds in watermelon.
3. Thomson's proposed that-

1. An atom consists of a positively charged sphere with electrons embedded in it.
2. An atom is electrically neutral since the positive and negative charges balance out each other.

Explanation of the incorrect option:

Option(A):

Neil Bohr gave the model of the atom in 1912 after the Rutherford model.

Option(B):

E.Goldstein discovered the proton in 1886.

Option(C):

Rutherford discovered the model of an atom in 1911 using a gold foil experiment.

Hence the first model of an atom was given by J.J Thomson .