Crash Course History of the Atom

Who were the first philosophers to propose the idea of atoms?

• Leucippus and Democritus

• Antoine Lavoisier and James Dalton

• Eugen Goldstein and J.J. Thompson

• Niels Bohr and Werner Heisenberg

What did Leucippus and Democritus call the tiny particles that make up matter?

• Atomos

• Corpuscles

• Electrons

• Protons

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Which scientist discovered that cathode rays were made up of negatively charged particles?

• Antoine Lavoisier

• James Dalton

• Eugen Goldstein

• J.J. Thompson

What model of the atom did J.J. Thompson propose?

• Plum pudding model

• Planetary model

• Quantum model

• Cloud model

Who conducted the gold foil experiment and discovered the existence of the nucleus?

• Antoine Lavoisier

• James Dalton

• Eugen Goldstein

• Ernest Rutherford

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What did Ernest Rutherford conclude about the structure of the atom based on the gold foil experiment?

• Most of the atom is empty space

• The electrons are randomly distributed in a positively charged matrix

• The nucleus is made up of protons and neutrons

• The electrons are arranged in specific energy levels

Who proposed the planetary model of the atom?

• Leucippus and Democritus

• Antoine Lavoisier

• Niels Bohr

• Werner Heisenberg

What did Niels Bohr's model of the atom suggest about the arrangement of electrons?

• They are randomly distributed in a positively charged matrix

• They are arranged in specific energy levels

• They are constantly moving in circular orbits

• They have properties of both particles and waves

Who proposed the quantum theory of the atom?

• Leucippus and Democritus

• Antoine Lavoisier

• Niels Bohr

• Werner Heisenberg

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According to the quantum model of the atom, how are electrons arranged around the nucleus?

• In specific energy levels

• In circular orbits

• In random positions

• In waves of probability