Which family on the periodic table is the most reactive?
Which family, which Group?
I would have to say the halogens. Fluorine, in particular, is the most oxidizing species on the Periodic Table; and will even oxidize oxygen up to
If you meet a fluorine chemist, he (or more rarely she) is likely to have an eye or finger missing. As a graduate student, I used to shy away from the main group inorganic chemists coming down the hall with a dewar. They were likely to be holding something rather nasty.