The Halogen Group
Atomic structure
All members have seven
electrons in the outer shell
of each atom. There is space
for one more electron in
each outer shell.Physical properties
Bromine (Br) is the only
halogen that is liquid.
Fluorine (F) and chlorine
(Cl) are gases, while iodine
and astatine (At) are solids.Chemical properties
Every halogen atom
receives one electron from
other atoms to form
a compound. Reactivity
decreases down the group.Compounds
The halogens react with
hydrogen (H) to form acidic
compounds. Halogen
compounds are used in
products such as bleach.FClBrIAtTsOne of the most reactive groups in the periodic table, this set includes
non-metals. The name “halogen” means “salt former”, which refers
to the way that elements in this group react with metals to form salts,
such as sodium chloride, widely known as common salt. Scientists
don’t know much about tennessine (Ts), an artificial halogen.
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