Q16 of 181 Page 282

Give two example each of (i) group 1 elements (ii) group 17 elements (iii) group 18 elements.

(i) Sodium and Potassium are the first group elements.


(ii) Chlorine and Bromine are the 17 group elements.


(iii) Argon and Xenon are the 18 group elements.


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