Halogens, P block, group 7.

Fact sheet about the halogens in the p block, group 7.

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The
P bl
ock:
Group
7
What
ar
e t
he
hal
ogens?
Hal
ogens
are
element
s i
n gr
oup7.
Al
l
hal
ogens
have
7 el
ect
rons
in
out
er
shel
l.
None
found
nat
ural
ly
in
element
f
orm.
Found
as
hal
ide
ion.
(
S i
ngl
y char
ged
ion)
.
Al
l
halogens
oc cur
as
diat
omi
c mol
ecul
es.
E.
g.
F2
and
B2.
Two
atoms
li
nked
by
singl
e
coval
ent
bond.
St
abi
li
ty
Hal
ogens
can
att
ain
stabi
li
ty
by:
Gai
n el
ectr
on f
rom met
al
to
for
m hal
ide
ion.
(
ioni
c bondi
ng )
Shar
ing
elect
ron
fr
om anot
her
atom.
(
covalent
ly
bonded)
I
n bot
h hal
ogens
oxi
dat
ion
stat
e i
s 1.
Physi
cal
pr
oper
ti
es
of
hal
ogens
Fl
uor
ine Chl
ori
ne Bromine I
odine
Isot
op es
and 19F 35C l
37C L 79Br
8 1B r
1 27 I
abundances 100% 75% 25 % 50% 5 0% 10 0%
Appearance
a t Pal
e ye l l
ow G r
een gas D ar
k r ed Sh i
ny bl
a c k
r
oom gas vol
ati
l
e li
quid sol
id
w h en
t
emp erat
ure wa r
me d g i
v es
purpl
e
vap o ur
.
Melt
ing
point
/ 53/
85 172/
239 266/
332 387 /
45 7
Boil
ing
point
S ol
ubil
i
ty
at React
s w i
t
h 0.
6 3.
5 0.
03
298k/
g per water
100g of
H2O
Col
our
s of
hal
ogens
i
n
sol
uti
on
Ha l
ogen I
n w a t
er I
n hexane
Chl
ori
n e Pal
e green Pal
e
g r
een
Br
omin e Red brown r
ed
I
odi
ne br
own vi
olet
Hal
f
equat
ions

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I
n di
spl
a cement r
eact
ions
one
of
the
hal
ogens
act
as
oxi
dis
ing
agent
and
other
r
educing
ag ent
.
Br2
+ 2e
2Br
I
2
+ 2e
2I
Br
gai
ns
e lect
ron
fr
om
I
ions
so
act
s as
oxi
disi
ng
agent
.
O xi
dis
ing
agent
must
be
other
hal
ogens.…read more

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