Arrange the following elements in the order of their increasing non-metallic character Li, O, C, Be, F
(a) F < O < C < Be < Li
(b) Li < Be < C < O< F
(c) F < O < C < Be < Li
(d) F < O < Be < C < Li
                
                  Ans (b)
Sol
Metallic character decreases when we move from left to right in a period
Li        Be    
     C    
       O      
     F
Hence option (b) is correct.