Chemistry · May / June 2019 · Paper 21 · Question 2
5070
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The table shows some of the properties of the elements in Group II of the Periodic Table. element proton (atomic) number atomic radius / nm melting point / °C Be 4 0.089 1280 Mg 12 0.136 650 Ca 20 0.174 850 Sr 38 0.191 768 Ba 56 0.198 714 Ra 88
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2(a)[1]
2(b)[1]
2(c)(i)[1]
2(c)(ii)[2]
2(d)[1]
2(e)[1]
2(f)[1]
2(g)[4]
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