Question

The first model of an atom was given by:
A. N. Bohr
B. E. Goldstein
C. Rutherford
D. J.J. Thomson

Answer 1

Joseph John Thomson, better known as J. J. Thomson was a British physicist who first theorized and offered experimental evidence that the atom was a divisible entity rather than the basic unit of matter, as was widely believed at the time.

Complete step by step answer:
Sir Joseph John Thomson (18 December 1856 – 30 August 1940) was a British physicist and Nobel Laureate in Physics, credited with the discovery of the electron, the first subatomic particle to be discovered.
Sir J.J Thomson gave the first model of the atom.
He by means of a cathode-ray experiment discovered the existence of negatively charged particles in an atom which led to the discovery of electrons.
He gave the plum-pudding model of an atom in which electrons are embedded in atom-like currants.
Positive electrons are distributed all over the atom.

So, the correct answer is Option D.

Note: In the early 1890s, much of Thomson’s research focused on electrical conduction in gases. During a visit to the United States in 1896, he gave a series of lectures discussing his findings. In 1897, the lectures were published as Discharge of Electricity through Gases. That same year, when Thomson returned to Cambridge, he made his most significant scientific discovery, that of the electron. Thomson attempted to use magnetism to see if the negative charge could be segregated from cathode rays, in another he tried to deflect the rays with an electric field, and in a third, he assessed the charge-to-mass ratio of the rays.