- published: 08 Apr 2015
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The halogens or halogen elements are a series of nonmetal elements from Group 17 IUPAC Style (formerly: VII, VIIA) of the periodic table, comprising fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At). The artificially created element 117, provisionally referred to by the systematic name ununseptium, may also be a halogen.
The group of halogens is the only periodic table group which contains elements in all three familiar states of matter at standard temperature and pressure.
In 1842 the Swedish chemist Baron Jöns Jakob Berzelius proposed the term "halogen" – ἅλς (háls), "salt" or "sea", and γεν- (gen-), from γίγνομαι (gígnomai), "come to be" – for the four elements (fluorine, chlorine, bromine, and iodine) that produce a sea-salt-like substance when they form a compound with a metal. Earlier, in 1811, the word "halogen" had been proposed as a name for the newly discovered element chlorine, but Davy's proposed term for this element eventually won out.
Like other groups, the candidates of this family show patterns in its electron configuration, especially the outermost shells resulting in trends in chemical behavior:
Thought I'd wait until I was old
I've resigned and fallen out of love
Now I wait on a bridge
For myself to heave the weight of all my yesterdays
Carlights fade across the bridge in even tides
Seems the night was made for passengers
Now I wait on a bridge for time to pass
Dissolve my sins, dissolve the emptiness
I would wait here for a lifetime, still
It's not the glory of pure will
For now, I'm standing here to sink
To fall on in, to fall on in
Now I'm waiting here for you
It's such an awkward thing to do
Is my mind wrecked inside?
All I've lost is a fear of falling
I would wait here for a lifetime, still
It's not the glory of pure will
For now, I'm standing here to sink
To fall on in, to fall on in
Now I'm waiting here for you
It's such an awkward thing to do
Is my mind wrecked inside?
All I've lost is a fear of falling
On and on
I can't go on
The liquid pulls me in
On and on, the rising tide
On and on
I can't go on
The liquid pulls me in
On and on, the rising tide
How'd I end up here so alone?
I have cried but never learned to love
Now I 'm worn into a bridge, awaiting signs
of happiness beyond a desperate tide
Carlights fade across the bridge in even tides
Seems the night was made for passengers
Now I wait on a bridge for time to pass
Dissolve my sins, dissolve the emptiness
On and on...