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17 January, 11:59

Which of the following sets represents a pair of isotopes?

14C and 14N

206Pb and 208Pb

O2 and O3

32S and 32S2-

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Answers (2)
  1. 17 January, 12:14
    0
    Isotopes have the same number of protons, but a different number of neutrons. This means that they have different masses, but retain the same chemical name. For this problem, Pb-206 and Pb-208 are both lead, but have different masses (206 and 208), so they are isotopes.

    C-14 and N-14 have a different number of protons (they are not the same element). O2 and O3 have a different number of molecules. S and S (2-) are the same element and have the same number of neutrons, but S (2-) just has 2 more electrons that give it the charge.
  2. 17 January, 12:20
    0
    Out of the following choices given, the following sets represents a pair of isotopes 206 Pb and 208Pb. The correct answer is B.
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