Development of Atomic Models

Which of the following statements is a part of Rutherford's model of the atom?

• Positively charged particles exist within the atom.

• Electrons are scattered evenly throughout atoms.

• Atoms are solid spheres.

In 1808, John Dalton proposed his atomic theory. Recall which of the following statements is one of the main ideas of Dalton's atomic theory.

• Atoms are solid spheres

• All matter is composed of indivisible atoms

• Atoms are made up of smaller charged particles

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Who carried out a cathode ray experimentand discovered Electrons in 1897?

• J. J. Thomson

• Ernest Rutherford

• John Dalton

• Chadwick

Name the person who discovered the nucleus.

• Ernest Rutherford

• James Chadwick

• John Dalton

• Issac Newton

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Bohr's model of the atom proposed that ___.

• electrons move around the nucleus in fixed orbits

• neutrons move around the nucleus

• neutrons do not exist, but are just paired protons and electrons

• the nucleus spins

Which scientist proposed a model of the atom in which the electrons are orbiting at different levels?

• Niels Bohr

• James Chadwick

• John Dalton

• Ernest Rutherford

Which scientist is responsible for first discovering that all the atoms of a particular element are identical but are different from the atoms of all other elements?

• Dalton

• Thomson

• Bohr

• Rutherford

Which scientist proposed a model of the atom in which the individual atoms were thought of as tiny solids like balls or marbles?

• John Dalton

• James Chadwick

• Ernest Rutherford

• J.J. Thomson

Whose model of an atom is displayed in the picture?

• Thomson

• Rutherford

• Dalton

• Bohr

J.J. Thomson's model of the atom is given this name because he believed that electrons were spread randomly throughout a positive sphere.

• plum pudding model

• orbital model

• Thomson's model

• plasma model