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NEET UG Atoms — practice questions

Explore 82 free Atoms questions in NEET UG Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Atoms questions and exercises with answers

Showing questions 1–30 of 82.

The first model of the atom was proposed by:Read the answer and worked solution →Thomson proposed his model of the atom in the year:Read the answer and worked solution →In Thomson's model, the positive charge is spread:Read the answer and worked solution →In Thomson's model, electrons are compared to seeds in a:Read the answer and worked solution →Thomson's model is picturesquely called the:Read the answer and worked solution →In Rutherford's model, the mass and positive charge sit in the:Read the answer and worked solution →Rutherford's model compares electrons around the nucleus to:Read the answer and worked solution →The scattering experiment was carried out in 1911 by Marsden and:Read the answer and worked solution →Each element emits a spectrum of radiation that is:Read the answer and worked solution →An atomic gas is usually excited by passing through it an electric:Read the answer and worked solution →The hydrogen series discovered in 1885 is named after:Read the answer and worked solution →Which of these is a series in the hydrogen spectrum?Read the answer and worked solution →Beyond the series limit, the hydrogen spectrum shows a:Read the answer and worked solution →Bohr set out his theory of the atom in how many postulates?Read the answer and worked solution →By Bohr's first postulate, an electron in a stable orbit emits:Read the answer and worked solution →Bohr called the stable non-radiating orbits the:Read the answer and worked solution →Bohr's second postulate quantises which quantity?Read the answer and worked solution →Allowed angular momenta are integral multiples of h divided by:Read the answer and worked solution →By Bohr's third postulate, a transition to lower energy emits a:Read the answer and worked solution →The energy of the emitted photon equals the difference between the:Read the answer and worked solution →The lowest energy state of an atom is called the:Read the answer and worked solution →The ionisation energy of the hydrogen atom is about:Read the answer and worked solution →True or false on atomic modelsRead the answer and worked solution →Quick picks on atomsRead the answer and worked solution →Match each idea to its ownerRead the answer and worked solution →Thomson or RutherfordRead the answer and worked solution →Bohr postulate or notRead the answer and worked solution →Order the atomic modelsRead the answer and worked solution →Fill the gaps on atomsRead the answer and worked solution →Spot the one that does not fitRead the answer and worked solution →

Worked practice questions

The first model of the atom was proposed by:

  1. J. J. Thomson
  2. Ernst Rutherford
  3. Niels Bohr now
  4. Johann Balmer
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Correct answer: A. J. J. Thomson

1. Electrons had just been identified in gas discharge work. 2. A picture of how they sit in the atom was needed. 3. J. J. Thomson proposed the first model in 1898. _Source: syllabus Physics Part II, Chapter 12, Atoms._

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Thomson proposed his model of the atom in the year:

  1. 1985
  2. 1898
  3. 1798
  4. 1911
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Correct answer: B. 1898

1. It came soon after the discovery of the electron. 2. It was the earliest picture of atomic structure. 3. The year was 1898. _Source: syllabus Physics Part II, Chapter 12, Atoms._

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In Thomson's model, the positive charge is spread:

  1. Uniformly
  2. At a point
  3. In a shell
  4. Along a line
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Correct answer: A. Uniformly

1. The positive charge was not thought to be concentrated. 2. It filled the whole volume of the atom. 3. So it is uniformly distributed. _Source: syllabus Physics Part II, Chapter 12, Atoms._

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