HALOGENS

HI ALL...

GROUP 17 ELEMENTS ARE ALSO KNOWN AS HALOGENS. GROUP 17 ELEMENTS ARE POISONOUS. 

IN GENERAL, HALOGENS HAVE LOW MELTING AND BOILING POINTS BECAUSE THEIR MOLECULES ARE ATTRACTED TO EACH OTHER BY WEAK FORCES. 

WHEN GOING DOWN THE GROUP, THE PHYSICAL STATE OF HALOGENS AT ROOM TEMPERATURE CHANGES FROM GAS TO LIQUID THEN TO SOLID. 

FLOURINE IS A PALE YELLOW GAS

CHLORINE IS A GREENISH YELLOW GAS

BROMINE IS A REDDISH BROWN LIQUID

IODINE IS A PURPLISH BLACK SOLID

DO YOU NOTICE THAT THE COLOUR OF HALOGENS ALSO BECOMES DARKER WHEN GOING DOWN GROUP 17?

WHY IS THIS SO?????

Learn more of PROPERTIES OF GROUP 17 ELEMENTS  by clicking to this CHEMWIKI