Chemistry · May / June 2019 · Paper 22 · Question 2
5070
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The table shows some of the properties of the elements in Group III of the Periodic Table. element proton (atomic) number atomic radius / nm melting point / °C B 5 0.080 2306 Al 13 0.125 660 Ga 31 0.125 30 In 49 0.150 157 Tl 81 0.155 304 Nh 113
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