Periodic
Table
|
Yttrium
Truss
Element
|
Symbol
|
Y
|
|
Atomic
Number
|
39
|
Relative
Atomic
Mass
12C
=
12.0000
|
88.905
85
(±2)
[Since
1985]
|
|
Atomic
Radius
pm
|
181
|
First
Ionisation
Energy
kJ
mol-1
|
616
|
|
Ionisation
Energy
(eV)
|
6.2171
|
|
Electronegativity
|
1.22
|
|
Density
kg
m-3
|
4469
[293
K]
|
|
Molar
Volume
cm3
|
19.89
|
Thermal
Conductivity
W
m-1
K-1
|
17.2
[300
K]
|
|
Melting
Point
K
|
1795
|
|
Boiling
Point
K
|
3611
|
|
Number
of
Isotopes
|
32
|
|
Isotope
Atomic
mass/u
Mole
fraction
|
89Y
88.905
8485(26)
1.0000
|
|
Inner
+
outer
Shells
|
|
|
Inner
+
outer
Orbitals
|
|
|
Filling
Orbital
|
|
Ground
State
Electron
Configuration
|
|
Ground
State
Electron
Configuration
with
free
Orbitals (n=15)
|
![[Picture]](039_f.jpg)
|
Ground
State
Electron
Configuration
with
compressed
Orbitals (n=56)
|
![[Picture]](039_c.jpg)
|
|
|
|
Singularity
|
|
|
|
|
|
s
|
p
|
d
|
f
|
g
|
h
|
i
|
j
|
|
1
|
2
|
|
|
|
|
|
|
|
|
2
|
2
|
6
|
|
|
|
|
|
|
|
3
|
2
|
6
|
10
|
|
|
|
|
|
|
4
|
2
|
6
|
1
|
9
|
14
|
|
|
|
|
|
5
|
2
|
6
|
10
|
14
|
18
|
|
|
|
|
6
|
|
|
|
|
|
|
|
|
|
7
|
|
|
|
|
|
|
|
|
|
8
|
|
|
|
|
|
|
|
|
|
|
|
|
Term
Symbol
|
2
D
3/2
|
|
Discovery
|
In
1794,
the
Finnish
chemist
Johan
Gadolin
(Åbo,
Finland)
discovered
yttrium
in
the
mineral
ytterbite,
which
was
later
renamed
gadolinite
for
Gadolin.
Gadolin
originally
called
the
element
ytterbium
after
ytterbite.
The
name
was
subsequently
shortened
to
yttrium,
and
later
another
element
was
given
the
name
ytterbium.
The
Swedish
surgeon
and
chemist
Carl-Gustav
Mosander
separated
the
element
in
1843.
|
|
Name
Derived
From
|
The
name
derives
from
the
Swedish
village
of
Ytterby
where
the
mineral
gadolinite
was
found.
|
|
![[Picture]](../images/aglarule.gif){kind=small}
