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BITSAT Atoms and Elements — practice questions — page 2

Explore 54 free Atoms and Elements questions in BITSAT Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Atoms and Elements questions and exercises with answers

Showing questions 31–54 of 54.

Match each model to what it could NOT explainRead the answer and worked solution →True or false: Rutherford's modelRead the answer and worked solution →True or false: Bohr's modelRead the answer and worked solution →Complete the reason Bohr's model failsRead the answer and worked solution →Which model does this belong to?Read the answer and worked solution →Match each quantum number to what it is calledRead the answer and worked solution →True or false: the quantum mechanical modelRead the answer and worked solution →Order the structure: from atom down to electronRead the answer and worked solution →Complete the (n + l) ruleRead the answer and worked solution →True or false: orbital energiesRead the answer and worked solution →Match each rule to what it forbids or requiresRead the answer and worked solution →Tap every statement Hund's rule requiresRead the answer and worked solution →The fundamental particlesRead the answer and worked solution →Assertion and reasonRead the answer and worked solution →Two are true, one is notRead the answer and worked solution →Three of these are wrong. Find the one that holds.Read the answer and worked solution →Which principle is being described?Read the answer and worked solution →Flip and pair: symbol with meaningRead the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →Tap every statement true of the Schrodinger modelRead the answer and worked solution →Reading the models backRead the answer and worked solution →Assertion and reason: filling orbitalsRead the answer and worked solution →True or false: shells and subshellsRead the answer and worked solution →Complete the two filling rulesRead the answer and worked solution →

Worked practice questions

Match each model to what it could NOT explain

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Matching pairs
  1. Left
    Thomson's model
    Right
    disproved by alpha-particle scattering
  2. Left
    Rutherford's model
    Right
    could not explain the atom's stability
  3. Left
    Bohr's model
    Right
    failed for multi-electron atoms
  4. Left
    Bohr's model again
    Right
    ignored the electron's wave nature
The failures are what drove the next model, and they are the examinable part. Source: syllabus Chemistry Part I, Ch 2 Structure of Atom.

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True or false: Rutherford's model

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Questions
  1. Statement is true
    Yes
    Statement
    Rutherford's alpha-particle scattering disproved Thomson's model.
  2. Statement is true
    Yes
    Statement
    Rutherford placed a tiny positive nucleus at the centre.
  3. Statement is true
    No
    Statement
    Rutherford's model explained why the electron does not fall in.
  4. Statement is true
    Yes
    Statement
    Rutherford's model resembles the solar system.
  5. Statement is true
    No
    Statement
    Rutherford's model described the energies of the electrons.
The scattering experiment settled the nucleus, but left stability unexplained. Source: syllabus Chemistry Part I, Ch 2 Structure of Atom.

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True or false: Bohr's model

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Questions
  1. Statement is true
    Yes
    Statement
    Bohr explained the spectrum of the hydrogen atom.
  2. Statement is true
    No
    Statement
    Bohr's model works equally well for multi-electron atoms.
  3. Statement is true
    Yes
    Statement
    Bohr allowed only certain orbits, each with a specific energy.
  4. Statement is true
    No
    Statement
    Bohr's model accounts for the wave nature of the electron.
  5. Statement is true
    Yes
    Statement
    Bohr's model contradicts the Heisenberg uncertainty principle.
It fixed hydrogen and broke on everything else. Source: syllabus Chemistry Part I, Ch 2 Structure of Atom.

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