Hafnium 72

Atomic No. Order:

Alphabetic Order:

2, 8, 18, 32,

10, 2

Ti
22

Zr
40

Hf
72

Rf
104

Upq
154

Bnq
204

Hafnium

Symbol

Atomic Number

Relative Atomic Mass
¹²C = 12.0000

178.49

Atomic Radius pm

156

First Ionisation Energy
kJ mol ^-1

642

Electronegativity

1.3

Density
kg m ^-3

13310 [293 K]
12000 [m.p.]

Molar Volume cm3

13.41

Thermal Conductivity
W m ^-1 K ^-1

23.0 [300 K]

Melting Point K

2503

Boiling Point K

5470

Number of Isotopes

Inner/outer Shells

Inner/outer Orbitals

Filling Orbital

5d ²

Ground State Electron
Configuration

[Xe]

5d ²

6s ²

Ground State Electron
Configuration with
free Orbitals (n=14)

0, 0, 0, 0, 8, 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	2	8	14	18
6	2	6	10		14	18	22
7
8

Term Symbol

³ F ₂

Discovery

Discovered by D. Coster and G.C. von Hevesey (Copenhagen, Denmark) in 1923

Name Derived From

Latin Hafnia meaning 'Copenhagen'

APSIDIUM ©	Created:	2002-08-08	072.pdf
	Page update:	2004-12-08	072.pdf