sensitive or detect (very) small amounts or only small sample needed allow (more) precise ignore accurate allow converse for chemical method ignore contains small amount / low concentration of iron 1 (c) any two from: transition elements (= they) unreactive / not very reactive • allow does not corrode ignore reference to rust strong / hard • ignore tough / durable / hard wearing malleable / easy to • ignore ductile / density / melting point 2 [6] M19.(a) (i) any two from: bubbles / effervescence / fizzing • ignore hydrogen / gas produced lithium disappears / gets smaller • allow dissolves do not allow melts / burns lithium moves on the surface of the water • ignore floats (universal indicator) turns blue / purple • 2 (ii) 2 left-hand side correct 1 2 right-hand side correct
sensitive or detect (very) small amounts or only small sample needed allow (more) precise ignore accurate allow converse for chemical method ignore contains small amount / low concentration of iron 1 (c) any two from: transition elements (= they) • unreactive / not very reactive allow does not corrode ignore reference to rust • strong / hard ignore tough / durable / hard wearing • malleable / easy to ignore ductile / density / melting point 2 [6] M19.(a) (i) any two from: • bubbles / effervescence / fizzing ignore hydrogen / gas produced • lithium disappears / gets smaller allow dissolves do not allow melts / burns • lithium moves on the surface of the water ignore floats • (universal indicator) turns blue / purple 2 (ii) 2 left-hand side correct 1 2 right-hand side correct
c2_periodic_table_markscheme.docx