Q. 243.7( 7 Votes )

Give the formulate of the compounds formed from the following sets of elements:

(a) calcium and fluorine

(b) hydrogen and sulphur

(c) nitrogen and hydrogen

(d) carbon and chlorine

(e) sodium and oxygen

(f) carbon and oxygen

Answer :

(a) The valency of calcium is 2 and that of fluorine is -1. So according to the valencies of both the elements, the formula becomes CaF2.

(b) The valency of hydrogen is 1 and that of sulphur is -2. So according to the valencies of both the elements, the formula becomes H2S.


(c) The valency of nitrogen is -3 and that of hydrogen is 1. So according to the valencies of both the elements, the formula becomes NH3.


(d) The valency of carbon is 4 and that of chlorine is -1. So according to the valencies of both the elements, the formula becomes CCl4.


(e) The valency of sodium is 1 and that of oxygen is -2. So according to the valencies of both the elements, the formula becomes Na2O.


(f) The valency of carbon is 4 and that of oxygen is -2. So according to the valencies of both the elements, the formula becomes CO2.


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