A-LevelChemistryAtomic structure9701/12 · Oct/Nov 2012 · Q321 Mark
Use of the Data Booklet is relevant to this question. The isotope 99Tc is radioactive and has been found in lobsters and seaweed adjacent to nuclear fuel reprocessing plants. Which statements are correct about an atom of 99Tc? 1 It has 13 more neutrons than protons. 2 It has 43 protons. 3 It has 99 nucleons.
A1, 2 and 3 are correct
B1 and 2 only are correct
C2 and 3 only are correct
D1 only is correct
✓ Correct answer
A: 1, 2 and 3 are correct
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