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+//ques-22.3
+//Determining coordination number of Cs and Br
+clc
+Rc=169;//radii of Cs+ (in pm)
+Ra=195;//radii of Br- (in pm)
+x=Rc/Ra;
+//As x>0.732
+c=8;//coordination number
+printf("The coordination number of Cs and Br both is %d.",c);