7.5 neutrons  7.6 electrons 


Question 8


8.1 Nitrogen: element,  oxygen: element,  carbon dioxide: compound  (3) 8.2 An element consists of one kind of atom only.  A compound consists of two or more different kinds of atoms. 


(2)


8.3 A mixture consists of substances that can be separated by physical means.  A compound consists of elements that can only be separated by chemical means. 


Question 9


9.1 List the reactants and the products of this decomposition chemical reaction: Reactants


Products Potassium permanganate 


Potassium manganite  Manganese dioxide  Oxygen 


9.2. A chemical reaction that breaks down  a compound into parts.  9.3 Element 


9.4 Use a glowing splint. If it relights, oxygen is present.  Question 10


10.1 List the solid, liquid and gas in order of: 10.1.1 solid,  liquid,  gas 10.1.2 gas,  liquid,  solid 10.1.3 solid,  liquid,  gas 10.1.4 gas,  liquid,  solid 10.2 liquid,  gas  10.3 Condensation 


10.4 The gas particles collide/bump into each other  and against the walls of the container. 


(2) (2) (2) (2) (2) (1)


(2) [13] Total: 70 marks


(4) (2) (1)


(2) [9]


(2) [7]


(1)


(1) [6]


143


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52  |  Page 53  |  Page 54  |  Page 55  |  Page 56  |  Page 57  |  Page 58  |  Page 59  |  Page 60  |  Page 61  |  Page 62