Atomic Theory

Front

What is the atomic theory?

Back

The atomic theory is a scientific theory that states that matter is composed of discrete units called atoms.

Front

Who proposed the first atomic model?

Back

John Dalton proposed the first atomic model, which described atoms as indivisible particles.

Front

What did J.J. Thomson discover?

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J.J. Thomson discovered the electron through his experiments with cathode rays.

Front

What is the significance of Rutherford's gold foil experiment?

Back

Rutherford's gold foil experiment demonstrated that atoms have a small, dense nucleus at their center, leading to the nuclear model of the atom.

Front

What is the Bohr model of the atom?

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The Bohr model describes electrons orbiting the nucleus in fixed paths or energy levels.

Front

What are subatomic particles?

Back

Subatomic particles are the particles that make up an atom, including protons, neutrons, and electrons.

Front

What charge do protons carry?

Back

Protons carry a positive charge.

Front

What charge do electrons carry?

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Electrons carry a negative charge.

Front

What is the mass of a neutron compared to a proton?

Back

A neutron has a mass approximately equal to that of a proton, but it is slightly heavier.

Front

What is the nucleus of an atom?

Back

The nucleus is the central part of an atom, containing protons and neutrons.