Periodic
Table
|
Lawrencium
|
Symbol
|
Lr
|
|
Atomic
Number
|
103
|
Relative
Atomic
Mass
12C
=
12.0000
|
[
262
]
262.1097
3.6(3)
h
Neutrons
159
|
|
Significant
Atomic
Mass
|
264
Neutrons
161
|
|
Atomic
Radius
pm
|
-
|
First
Ionisation
Energy
kJ
mol
-1
|
-
|
|
Ionisation Energy (eV)
|
4.9
?
|
|
Electronegativity
|
1.3
|
|
Density
kg
m
-3
|
-
|
|
Molar Volume
cm
3
|
-
|
Thermal
Conductivity
W
m
-1
K
-1
|
10
[300
K] (est.)
|
|
Melting
Point
K
|
-
|
|
Boiling
Point
K
|
-
|
|
Number
of
Isotopes
|
10
|
|
Inner
+
outer
Shells
|
|
|
Inner
+
outer
Orbitals
|
|
|
Filling
Orbital
|
|
|
Ground
State
Electron
Configuration
|
|
|
|
Ground
State
Electron
Configuration
with
free Orbitals (n=
15)
|
|
|
|
|
Ground
State
Electron
Configuration
with
compressed
Orbitals
(n= 162
)
|
|
|
|
|
Singularity
|
|
|
|
|
|
s
|
p
|
d
|
f
|
g
|
h
|
i
|
j
|
|
1
|
2
|
|
|
|
|
|
|
|
|
2
|
2
|
6
|
|
|
|
|
|
|
|
3
|
2
|
6
|
10
|
|
|
|
|
|
|
4
|
2
|
6
|
10
|
14
|
|
|
|
|
|
5
|
2
|
6
|
10
|
14
|
18
|
|
|
|
|
6
|
2
|
6
|
1
|
9
|
14
|
18
|
22
|
|
|
|
7
|
2
|
6
|
10
|
14
|
18
|
22
|
26
|
|
|
8
|
|
|
|
|
|
|
|
|
|
|
|
|
Term
Symbol
|
2P
1/2
|
|
|
Discovered
by
A.
Ghiorso,
A.E.
Larsh,
T.
Sikkeland
and
R.M.
Latimer
(Berkeley,
USA)
in
1961
|
|
Obsolete
Names
|
Unniltrium,
Unt
eka-lutetium
|
|
Name
Derived
From
|
Named
after
E.O.
Lawrence
(b.
Aug.
8,
1901,
Canton,
S.D.,
U.S./
d.
Aug.
27,
1958,
Palo
Alto,
Calif.
)
|
American
physicist,
winner
of
the
1939
Nobel
Prize
for
Physics
for
his
invention
of
the
cyclotron,
the
first
particle
accelerator
to
achieve
high
energies.
Lawrence
earned
his
Ph.D.
at
Yale
University
in
1925.
An
assistant
professor
of
physics
at
Yale
(1927-28),
he
went
to
the
University
of
California,
Berkeley,
as
an
associate
professor
and
became
full
professor
there
in
1930.
|
|
