Arrange the following elements in the increasing order of non- metallic character:
`B, C, Si, N and F.`

Explanation

Arranging the elements into different groups and periods in order of their increasing atomic number we have .

Since the metallic character increases down the group and non- metallic character increases along a period from left to right therefore Si the most metallic or the least non- metallic element . The overall increasing order of non- metallic character is `: Si lt B lt C lt N lt F`