J.J. Thomson's Plum Pudding Model Quiz
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J.J. Thomson's Plum Pudding Model Quiz

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Questions and Answers

Who discovered that the atom is not indivisible and is made up of even smaller particles called electrons, protons, and neutrons?

Sir J.J. Thomson

What did Eugen Goldstein's discovery of anode rays establish about the atom?

Presence of positively charged proton

According to Thomson's plum-pudding model, how are atoms described?

Large sphere of uniform positive charge with scattered electrons

What experiment performed by Geiger and Marsden led to the failure of Thomson's plum-pudding model?

<p>α-ray scattering experiment</p> Signup and view all the answers

What particles are typically found in the nucleus of an atom?

<p>Protons and neutrons only</p> Signup and view all the answers

How many electrons can the L-shell accommodate in an atom?

<p>10</p> Signup and view all the answers

What did Ernest Rutherford's experiment with alpha particles and gold foil lead to the discovery of?

<p>The nucleus of an atom</p> Signup and view all the answers

What does the atomic number of an atom indicate?

<p>Number of protons in the nucleus</p> Signup and view all the answers

How did Niels Bohr revise Ernest Rutherford's atomic model?

<p>Introduced quantized electron orbits</p> Signup and view all the answers

What is meant by a 'stationary state' in an atom?

<p>When an electron is in a quantized energy level</p> Signup and view all the answers

What is the relationship between the numbers of electrons and protons in an atom?

<p>They are equal in a neutral atom.</p> Signup and view all the answers

What is a shell in an atom?

<p>A region around the nucleus where electrons are found.</p> Signup and view all the answers

What is revealed by the atomic number of an element?

<p>Number of protons in the nucleus</p> Signup and view all the answers

What does Ernest Rutherford's experiment with alpha particles suggest about the nucleus?

<p>It is small, dense, and positively charged.</p> Signup and view all the answers

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