Development of the Atomic Theory

Who discovered the negatively charge of an atom known as electron and proposed the Plum Pudding Model to describe the structure of an atom?

• Chadwick

• Goldstein

• Thomson

• Rutherford

Who discovered the neutral charge of an atom known as neutron?

• Chadwick

• Goldstein

• Thomson

• Rutherford

Who discovered the center of an atom known as nucleus which is a positively charged using the Gold Foil Experiment?

• Chadwick

• Goldstein

• Thomson

• Rutherford

He believed that all matter in the universe are made up of indivisible units known as 'atomos'.

• Democritus

• Dalton

• Mendeleev

• Moseley

He gave us the early idea about the composition of compounds. According to him compounds are made up of two or more atoms of the same or different elements.

• Democritus

• Dalton

• Mendeleev

• Moseley

This is an example of which model of the atom?

• Rutherford's Model

• Plum Pudding Model

• Atomic Model

• Bohr's Model

What experiment did J.J. Thomson run to develop his model of the atom?

• Gold-Foil Experiment

• Definite Proportion Experiment

• Cathode-Ray Tube Experiment

• No experimentation was done

Which of these had scientific evidence to back their models of the atom?

• Democritus

• John Dalton

• J.J. Thomson

• Ernest Rutherford

Who developed this model of the atom?

• Plum Pudding Model

• J.J. Thomson

• Proto-Electron Model

• Ernest Rutherford

What did the cathode-ray tube experiment prove?

• Atoms could be broken into smaller parts

• Atoms caused the changes in matter

• Atoms join to create compounds

• The center of an atom has a nucleus

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