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Isotopes and relative atomic mass

Quiz by Oak National Academy: GCSE Combined Science Edexcel Higher

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6 questions
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  • Q1
    Match the term to its definition.
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    Linking
    30s
  • Q2
    Why do chlorine and copper have relative atomic masses which are not whole numbers, i.e. 35.5Cl and 63.5Cu?
    They are determined from the isotopes of the elements.
    They have gained half an electron.
    They contain half a neutron.
    They contain half a proton.
    They have lost half an electron.
    30s
  • Q3
    Will the isotopes of hydrogen H-1, H-2 and H-3 have the same chemical properties? Select the correct answer to explain why or why not.
    Yes, as they have the same number of protons and a different number of neutrons.
    No, as they have a different number of neutrons.
    Yes, as they have the same number of electrons.
    Yes, as they have a different number of neutrons.
    No, as they have the same number of protons and electrons.
    30s
  • Q4
    Many isotopes are radioactive and can be used for medical purposes, however their abundance is very low. Calculate the abundance of Cr-50 when Cr-52 is 84.0%, Cr-53 is 9.5% and Cr-54 is 2.5%.
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    30s
  • Q5
    Calculate the relative atomic mass of silicon. The three silicon isotopes have atomic masses and relative abundances of 28 (92.2%), 29 amu (4.7%) and 30 amu (3.1%). Give your answer to 1d.p.
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    30s
  • Q6
    Bromine has a relative atomic mass of 79.9 (1d.p.). Bromine has two naturally occurring isotopes. Bromine-79 is 55% abundant. What is the mass number of the other isotope?
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    30s

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