Atomic Theory Test

Who was considered as one of the founders of the ancient atomist theory?

• John Dalton

• Democritus

• JJ Thomson

• Niels Bohr

Which scientist is known for his, "Plum Pudding" model of an atom?

• John Dalton

• Erwin Schrodinger

• Ernest Rutherford

• JJ Thomson

Which of the following is TRUE about Dalton's atomic theory?

• Each element contains a set of protons, neutrons, and electrons.

• All atoms, regardless of whatever element, are identical.

• Atoms can be created and destroyed.

• Each element is composed of extremely small particles called, "atoms".

How did Rutherford discovered the proton?

• through the cathode-ray experiment

• through the Gold-foil experiment

• through studying the wave property of an electron

• through injecting gamma rays in an atom

Rutherford's experiment provided evidence that ___________.

• Rutherford's experiment provided evidence that ___________.

• Gold is not as dense as previously thought.

• Alpha particles have a positive charge.

• There is a dense, positively-charged nucleus at the center of the atom.

Who gave the idea that the atom is mostly made up of empty space?

• Ernest Rutherford

• JJ Thomson

• John Dalton

• Neils Bohr

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

• Ernest Rutherford

• Erwin Schrodinger

• JJ Thomson

• Neils Bohr

Which among the following is TRUE about Schrodinger's atomic theory?

• Energy is concentrated on the electrons.

• Electrons can act as particles and waves.

• The electrons' location can be determined by merely looking at it.

• Electrons are infinite in number.

What is the correct order of scientists in order of their work related to the atomic theory from earliest to most recent?

• Ernest Rutherford, JJ Thomson, John Dalton, & Democritus

• JJ Thomson, John Dalton, Ernest Rutherford, & Democritus

• Democritus, John Dalton, JJ Thomson, Ernest Rutherford.

• John Dalton, JJ Thomson, Democritus, & Ernest Rutherford

What was J. J. Thomson's contribution to the atomic theory?

• Discovered the electron

• Created a model of the atom with electrons moving around the nucleus in fixed orbits

• Discovered the nucleus -did the gold foil experiment

• Discovered the neutron