CIE Jun 2013 v1 Paper 2 Q3

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Examiners For Use This question refers to the elements in the section of the Periodic Table shown below. Be Li Na Mg K Ca N Ptransition elementsGa Ge As B Al C Si He Ne Ar Kr O S Se F Cl Br (a) From this list of elements, identify in each case one element that has the property described. Give the symbol of the element. (i) An element thatoats on cold water and reacts readily with it.(ii) An element that forms an oxide that is a reducing agent.(iii) The element that has the smallestrst ionisation energy.(iv) The element which has a giant molecular structure and forms an oxide which has a simple molecular structure.(v) The element in Period 3 (Na to Ar) that has the smallest anion.(vi) The element in Period 3 (Na to Ar) which forms a chloride with a low melting point and an oxide with a very high melting point.[6]UCLES 2013 9701/21/M/J/13<br /> Examiners For Use (b) Use the elements in Period 3 (Na to Ar) in the section of the Periodic Table opposite to identify the oxide(s) referred to below. In each case, give the formula of the oxide(s). (i) An oxide which when placed in water for a long time has no reaction with it.(ii) An oxide which dissolves readily in water to give a strongly alkaline solution.(iii) Two acidic oxides formed by the same element.and(iv) An oxide which is amphoteric.[5] (c) Fluorine reacts with other elements in Group VII to form a number of different compounds. Two such compounds and their boiling points are given in the table. compound boiling point / C Cl F3 12 BrF3 127 (i) The two molecules have similar electronic con gurations. Showing outer electrons only, draw a 'dot-and-cross' diagram of the bonding in Cl F3. (ii) The two molecules have the same shape. Suggest why the boiling points are signi cantly different.[4] [Total: 15]UCLES 2013 9701/21/M/J/13 [Turn over<br /> BLANK PAGEUCLES 2013 9701/21/M/J/13<br />

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