chloride has high mp molten chloride conducts electricity form positive ions/form compound with non-metals solid at room temperature any 3 for 1 mark each 3 (b) group 2 formula of is XO/ion is X2+/ oxide forms alkaline solution for 1 mark each 2 (c) XCl2/ X2+(Cl–)2(X2+)(Cl–)2 Symbol of any group 2 element instead of X (b) (c) error carried forward accepted. → e.g. Group 1 XCl → Group 3 XCl3 → for 1 mark 1 [6]
chloride has high mp molten chloride conducts electricity form positive ions/form compound with non-metals solid at room temperature any 3 for 1 mark each 3 (b) group 2 formula of is XO/ion is X2+/ oxide forms alkaline solution for 1 mark each 2 (c) XCl2/ X2+(Cl–)2(X2+)(Cl–)2 Symbol of any group 2 element instead of X (b) → (c) error carried forward accepted. e.g. Group 1 → XCl Group 3 → XCl3 for 1 mark 1 [6]