Q67 of 400 Page 171

Will it dissolve in an organic solvent or not?

It will dissolve in an organic solvent.

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67 State whether X will have a high melting point or low melting point. 67 Will it be a good conductor of electricity or not? 68 A metal combines with a non-metal by the transfer of electrons to form a compound Y.

(i) State the type of bonds in Y.


(ii) What can you say about its melting point and boiling point ?


(iii) Will it be a good conductor of electricity?


(iv) Will it dissolve in an organic solvent or not ?

 69 The electronic configurations of three elements X, Y and Z are as follows:

X 2, 4


y 2, 7


z 2, 1


(a) Which two elements will combine to form an ionic compound?


(b) Which two elements will react to form a covalent compound ? Give reasons for your choice.