Question

Match the scientist to his contribution to the atomic theory. Match Term Definition J.J. Thomson A) Positively charged nucleus

John Dalton B) Plum pudding model
Ernest Rutherford C) Atoms indivisible
James Chadwick D) Discovery of neutrons

Answer 1

J.J. Thomson :Plum Pudding Model

James Chadwick: Discovery of neutrons

John Dalton:Atoms indivisible

Ernest Rutherford:Positively charged nucleus


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Answer 2

Answer is:

J.J. Thomson- B) Plum Pudding Model.

J. J. Thomson discovered the electron in 1897.

His "plum pudding" model (1904) suggested: the electrons are embedded in the positive charge.

John Dalton - C) Atoms indivisible.

Dalton stated that atom is matter that can not be divided

Ernest Rutherford - A) Positively charged nucleus.

According to Rutherford model of the atom:

1) Atoms have their charge concentrated in a very small nucleus.

2) Major space in an atom is empty.

3) Atoms nucleus is surrounded by negatively charged particles called electrons.

4) An atom is electrically neutral.

James Chadwick - D) Discovery of neutrons.

James Chadwick was a British physicist who was awarded the 1935 Nobel Prize in Physics for his discovery of the neutron in 1932.