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Mass spectrometry

Quiz by Oak National Academy: GCSE Chemistry OCR Foundation

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6 questions
Show answers
  • Q1
    What does the M⁺ peak represent in a mass spectrum?
    The heaviest fragment
    The molecular ion
    The base peak
    30s
  • Q2
    What does fragmentation in mass spectrometry help identify?
    Molecular structure
    Electron configuration
    Atomic number
    30s
  • Q3
    How is the relative atomic mass calculated using mass spectrometry data?
    (mass of isotope 1 × abundance) + (mass of isotope 2 × abundance)/100
    Using the atomic number
    Counting the total number of isotopes
    30s
  • Q4
    What is a molecular ion?
    A molecule that has formed a covalent bond.
    An ion produced when the molecule is ionised by loss of an electron.
    A neutral molecule with no charge.
    A molecule with an unequal number of protons and neutrons.
    30s
  • Q5
    Calculate the relative atomic mass of bromine, given isotopes Br-79 (50.7%) and Br-81 (49.3%). Give your answer to one decimal place.
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    30s
  • Q6
    Calculate the relative atomic mass of neon, given isotopes Ne-20 (90.48%), Ne-21 (0.27%), Ne-22 (9.25%). Give your answer to two decimal places.
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    30s

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