U3 - Atomic Theory Scientists

Front

What is the Plum Pudding Model?

Back

A model of the atom proposed by J.J. Thomson, suggesting that atoms are composed of a positively charged 'soup' with negatively charged electrons scattered throughout.

Front

What does the Billiard Ball Model represent?

Back

A model proposed by John Dalton, depicting atoms as solid, indivisible spheres, similar to billiard balls.

Front

Who discovered the neutron?

Back

James Chadwick discovered the neutron in the 1930s.

Front

What is the Planetary Model of the atom?

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A model developed by Niels Bohr, which describes electrons orbiting the nucleus in defined paths, similar to planets orbiting the sun.

Front

What did Bohr believe about electrons?

Back

Bohr believed that electrons orbit the nucleus at specific distances, with quantized energy levels.

Front

What is the Gold Foil Experiment?

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An experiment conducted by Ernest Rutherford that demonstrated the existence of a small, dense nucleus within the atom.

Front

What is the role of protons in an atom?

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Protons are positively charged particles found in the nucleus of an atom, determining the atomic number and identity of the element.

Front

What is the charge of an electron?

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Electrons have a negative charge.

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.

Front

Who proposed the idea of the atom as indivisible?

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John Dalton proposed that atoms are indivisible and the basic building blocks of matter.