Ernest Rutherford's Atomic Theory

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Questions and Answers

What fundamental change did Rutherford propose in the atomic model in 1911?

  • He proposed that atoms cannot be divided and are indivisible.
  • He suggested that atoms are composed only of electrons and protons.
  • He introduced the concept of a dense nucleus surrounded by orbiting electrons. (correct)
  • He theorized that electrons are embedded within a positive framework.

Which of the following elements did Rutherford successfully transmute using alpha particles?

  • Nitrogen into Oxygen (correct)
  • Hydrogen into Helium
  • Carbon into Nitrogen
  • Oxygen into Carbon

In what year was Rutherford awarded the Nobel Prize in Chemistry?

  • 1920
  • 1905
  • 1911
  • 1908 (correct)

Which types of radiation did Rutherford distinguish during his research?

<p>Alpha, beta, gamma (D)</p> Signup and view all the answers

Rutherford's famous quote reflects what notable achievement in his research?

<p>The demonstration of nuclear fission (A)</p> Signup and view all the answers

What significant discovery did Rutherford make in 1919 related to the composition of atoms?

<p>The proton (D)</p> Signup and view all the answers

Which university did Rutherford attend on an overseas scholarship to study with J.J. Thomson?

<p>Cambridge University (B)</p> Signup and view all the answers

Rutherford's early career opportunity at McGill University was largely due to a recommendation by whom?

<p>J.J. Thomson (C)</p> Signup and view all the answers

What was one of the functions of the complex scientific instrument used by Rutherford as depicted in the image?

<p>To study radioactive decay and the resulting transformations in matter (A)</p> Signup and view all the answers

What was a pioneering achievement by Rutherford concerning the disintegration of elements?

<p>He showed that elements could change into other elements through radioactive decay. (B)</p> Signup and view all the answers

Flashcards

Ernest Rutherford

A prominent physicist known for his work on atomic structure and radioactivity.

Radioactivity

The emission of radiation from radioactive elements leading to atomic disintegration.

Rutherford model

Model proposing that atoms have a dense, positively charged nucleus with electrons orbiting.

Nuclear fission

The process of splitting an atom, transforming one element into another.

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Alpha particles

Positively charged particles emitted during radioactive decay.

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Nobel Prize in Chemistry

Award won by Rutherford in 1908 for his contributions to the field.

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Proton discovery

Rutherford discovered the proton in 1919, a positively charged particle in the nucleus.

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Disintegration of elements

The process by which radioactive elements break down into other elements.

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Rutherford’s Quote

Rutherford said, 'I have broken the machine and touched the ghost of matter' reflecting his discoveries.

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Rutherford's Early Life

Rutherford's beginnings included a farming background and multiple science degrees.

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Study Notes

Ernest Rutherford's Contributions to Atomic Theory

  • Rutherford transformed our understanding of the atom, identifying its components and revealing its inner structure
  • He described two types of radiation: alpha and beta
  • Rutherford was born into a farming family in New Zealand
  • He won a scholarship to study at Cambridge University
  • Thomson recommended Rutherford for a professorship at McGill University in Montreal
  • Rutherford's work in Montreal won him the Nobel Prize for his "investigations into the disintegration of the elements"
  • He discovered that atoms were not indivisible but contained smaller parts
  • He identified alpha and beta radiation, and found that alpha radiation consisted of positively charged particles
  • He first achieved the transmutation of the elements by transforming nitrogen atoms into oxygen using alpha particles in a special tube.
  • In 1917, Rutherford stated "I have broken the machine and touched the ghost of matter."

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