History of Atomic Theory Quiz

What is Neils Bohr's contribution to the atomic theory?

• Created the atomic theory

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

• Discovered that the proton had a positive charge

• Believed that atoms of a given element are identical

• Discovered the electron

Rutherford's gold foil experiment provided evidence that...

• negative and positive charges are spread evenly throughout the atom.

• alpha particles have a positive charge.

• gold is not a dense as previously thought.

• there is a dense positively charged nucleus at the center of an atom.

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NGSS.HS-PS1-8

Which scientist proposed the first atomic theory based on scientific evidence?

• J.J. Thomson

• John Dalton

• Ernest Rutherford

• Niels Bohr

According to Dalton's Atomic Theory, atoms of the same element are:

• Different in mass and properties

• Indivisible and indestructible

• Identical in mass and properties

• Made up of protons, neutrons, and electrons

J.J. Thomson's Plum Pudding Model suggested that:

• Electrons orbit the nucleus in fixed paths

• Atoms are indivisible

• Atoms consist of a positively charged 'pudding' with negatively charged 'plums' (electrons) embedded in it

• Atoms have a dense, positively charged nucleus

What was the main conclusion of Rutherford's Gold Foil Experiment?

• Atoms are indivisible

• Electrons are embedded in a positively charged sphere

• Atoms have a small, dense, positively charged nucleus

• Electrons orbit the nucleus in fixed paths

Tags

NGSS.HS-PS1-8

In Bohr's Model of the Atom, electrons:

• Are embedded in a positively charged sphere

• Move in fixed orbits around the nucleus

• Are scattered randomly around the nucleus

• Are part of a 'cloud' around the nucleus

Which model of the atom introduced the concept of quantized energy levels?

• Dalton's Atomic Theory

• Thomson's Plum Pudding Model

• Rutherford's Model

• Bohr's Model

The Quantum Mechanical Model of the atom describes electrons as:

• Particles in fixed orbits

• Waves with a probability distribution

• Particles embedded in a positively charged sphere

• Particles in a dense nucleus

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Who is credited with the discovery of the electron?

• John Dalton

• J.J. Thomson

• Ernest Rutherford

• Niels Bohr