Atomic Theory

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Who proposed the first atomic theory?

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John Dalton proposed the first atomic theory, which stated that matter is made up of indivisible atoms.

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What did Rutherford discover in his gold-foil experiment?

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Ernest Rutherford discovered the nucleus of the atom, which is a dense central core.

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Who is known as one of the founders of ancient atomist theory?

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Democritus is known as one of the founders of ancient atomist theory, proposing that everything is made of atoms.

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What was the conclusion of Rutherford's gold-foil experiment regarding atomic structure?

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Rutherford concluded that most of the atom is empty space, with a small, dense nucleus.

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Who discovered the electron?

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

Front

What is the atomic theory?

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

Front

What is the nucleus of an atom?

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

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What are protons?

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Protons are positively charged particles found in the nucleus of an atom.

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What are neutrons?

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Neutrons are neutral particles found in the nucleus of an atom, contributing to its mass.

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What are electrons?

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Electrons are negatively charged particles that orbit the nucleus of an atom.