Question

The elements of one period are given below in order from left to right $Li,Be,B,C,O,F,Ne$
Which one of the above elements belongs to the halogen series?

• A. $Li$
• B. $O$
• C. $F$
• D. $Ne$

Answer 1

The correct option is C $F$

Fluorine have $7$ valence electrons so it belongs to halogen series.