a ) Name any 2 impurities and state the chemical to remove these impurities.
b ) Identify the following on basis of given atomic numbers :-
19 , 15 , 14 , 8 , 4
(i) Gas with valency of 2
(ii) Metalloid with valency of 4
(iii) Metal with valency of 1
(iv) Non metals with valency of 3
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sorry bro don't get it
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b.(i) 8 (Oxygen)
(ii) 14 (Silicon)
(iii) 19 (Potassium)
(iv) 15 (Phosphorus)
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