O Level Science(Chemistry) Examination Preparation for Sec 4
1. Use the Periodic Table to answer this question. (a)(i) Name the element in Group IV and Period 6 of the Periodic Table. (ii) State whether the element you have named is a metal, non-metal or metalloid. (iii) Name the salt that this element can form with chlorine. (b) Group I elements have similar chemical properties. What is the common characteristic in their atomic structure that contributes to similarities in chemical properties? 2. (a) What type of oxide do zinc and aluminium form? (b) Gold, lead and sodium are metals. (i) Place these metals in order of reactivity, with the most reactive first. (ii) Write balanced equations sodium and gold each react, if at all, with water. (iii) Suggest what product is formed when sodium reacts with chlorine gas. 3. Astatine ...