Yr+9+Chemistry+chapter+answers

Ques 6 - 13 p12 answers
 * 6** The rows in the periodic table are called periods.
 * 7** Groups are the vertical columns in the periodic table.
 * 8** Three special blocks with no normal group numbers are the transition elements, the lanthanides and the actinides.
 * 9** There are far more metals than non-metals in the periodic table.
 * 10** The metalloids are: boron, silicon, germanium, arsenic, antinomy, tellurium, polonium and astatine.
 * 11** The non-metals are: H, He, C, N, O, F, Ne, P, S, Cl, Ar, Se, Br, Kr, I, Xe and Rn.
 * 12** Examples might be: iron, gold, copper, silver, zinc, mercury and platinum.
 * 13 a** False: Horizontal rows in the periodic table are periods.
 * b** False: Vertical columns are called groups.
 * c** False: The most reactive metallic atom would be francium Fr.
 * d** True: The most reactive non-metallic atom would be fluorine F.
 * e** True: The transition elements are all metals.