Lutetium 71

Atomic No. Order:

Alphabetic Order:

Periodic Table

2, 8, 18, 32,

9, 2

Lu
71

Lr
103

Upt
153

Bnt
203

Lutetium

Symbol

Atomic Number

Relative Atomic Mass
¹²C = 12.0000

174.9668 ± 0.01

Atomic Radius pm

173

First Ionisation Energy
kJ mol ^-1

523.5

Electronegativity

1.27

Density kg m ^-3

9840 [298 K]

Molar Volume cm ³

17.78

Thermal Conductivity
W m ^-1 K ^-1

16.4 [300 K]

Melting Point K

1936

Boiling Point K

3668

Number of Isotopes

Inner/outer Shells

Inner/outer Orbitals

Filling Orbital

5d ¹

Ground State Electron Configuration

[Xe]

5d ¹

6s ²

Ground State Electron
Configuration with
free Orbitals (n=15)

0, 0, 0, 0, 9, 6

Ground State Electron Configuration with compressed Orbitals (n=96)

0, 0, 0, 0, 32, 64

Singularity

182

	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	1	9	14	18
6	2	6	10		14	18	22
7
8

Term Symbol

² D _3/2

Discovery

Discovered by G. Urbain (Paris, France) in 1907 and independently by C. James (University of New Hampshire, USA)

Name Derived From

Greek Lutetia meaning 'Paris'

APSIDIUM ©	Created:	2002-08-08	071.pdf
	Page update:	2007-12-09	071.pdf