Atomic Theory Quiz

Who suggested the first atomic theory around 400 BC?

• John Dalton

• J.J. Thompson

• Democritus

• Ernest Rutherford

What did Democritus believe all things were composed of?

• Water and air

• Minute, invisible, indestructible particles of pure matter

• Fire and earth

• Electrons and protons

What model did J.J. Thompson create to describe the atom?

• Nuclear Model

• Quantum Model

• Plum Pudding Model

• Planetary Model

Who proposed the revolutionary view of the atom in 1911?

• Niels Bohr

• Erwin Schrödinger

• Ernest Rutherford

• Albert Einstein

What did Rutherford's experiment with alpha particles and gold foil demonstrate?

• Electrons orbit the nucleus in fixed paths

• Atoms are mostly empty space with a small, dense nucleus

• Electrons exist in different energy levels

• Atoms are indivisible

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What did Niels Bohr suggest about the electrons in an atom?

• Electrons are found in a cloud around the nucleus

• Electrons orbit the nucleus in fixed paths or shells

• Electrons are located in the nucleus

• Electrons do not exist in atoms

What did Erwin Schrödinger introduce in his model of the atom?

• Fixed orbits for electrons

• Wave mechanics

• Indivisible atoms

• Dense nucleus

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What is Schrödinger's wave equation used for today?

• To understand the movement of planets

• To understand atoms and molecules

• To measure the speed of light

• To calculate gravitational force

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What did Bohr's model of the atom emphasize?

• The indivisibility of atoms

• The idea of electrons orbiting the nucleus

• The existence of a dense nucleus

• The wave nature of electrons

What was the evidence that Bohr used to support his theory?

• The deflection of alpha particles

• The measurement of the line spectrum emitted by hydrogen gas

• The indivisibility of atoms

• The wave nature of electrons