Atomic Theory Evolution Quiz

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Questions and Answers

Who discovered the electron and suggested the 'plum pudding' model of the atom?

  • Bohr
  • J.J. Thomson (correct)
  • John Dalton
  • Rutherford

In Rutherford's model of the atom, how are electrons described to orbit the atomic nucleus?

  • In random paths
  • In elliptical orbits
  • In energy levels (correct)
  • In fixed circular paths

What is the charge of a proton?

  • Variable
  • Negative
  • Positive (correct)
  • Neutral

According to Bohr's modification of Rutherford's model, what did he introduce the idea of?

<p>Energy levels (D)</p> Signup and view all the answers

What is the mass of an electron?

<p>9.1 x10-28 g (B)</p> Signup and view all the answers

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Study Notes

Atomic Structure

  • J.J. Thomson discovered the electron and suggested the 'plum pudding' model of the atom.

Rutherford's Model

  • In Rutherford's model, electrons are described to orbit the atomic nucleus in energy levels or shells, not in a fixed position.

Protons

  • The charge of a proton is +1 elementary charge.

Bohr's Modification

  • Bohr introduced the idea of energy quantization, where electrons occupy specific energy levels around the nucleus.

Electrons

  • The mass of an electron is approximately 9.10938215 × 10^(-31) kg.

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