Gallium 31

Atomic No. Order:

Alphabetic Order:

Periodic Table

2, 8, 18,

B
5

Al
13

Ga
31

In
49

Tl
81

Uut
113

Uht
163

But
213

Gallium

Symbol

Atomic Number

Relative Atomic Mass
¹²C = 12.0000

69.723 (±1) [Since 1987]

Atomic Radius pm

122

First Ionisation Energy
kJ mol ^-1

578.8

Ionisation Energy (eV)

5.9993

Electronegativity

1.81

Density
kg m ^-3

5907 [293 K]
6113.6 [m.p.]

Molar Volume cm ³

11.81

Thermal Conductivity
W m ^-1 K ^-1

40.6 [300 K]

Melting Point K

302.93

Boiling Point K

2676

Number of Isotopes

Isotope Atomic mass/u Mole fraction

69Ga 68.925 581(3) 0.601 08(9)
71Ga 70.924 7073(20) 0.398 92(9)

Inner + outer Shells

Inner + outer Orbitals

Filling Orbital

4p ¹

Ground State Electron
Configuration

[Ar]

3d ¹⁰

4s ²

4p ¹

Ground State Electron
Configuration with
free Orbitals (n=5)

0, 0, 0, 5

Ground State Electron
Configuration with
compressed Orbitals (n=24)

0, 0, 0, 24

Singularity

	s	p		d	f	g	h	i	j
1	2
2	2	6
3	2	6		10
4	2	1	5	10	14
5
6
7

Term Symbol

²P _1/2

Discovery

The name derives from the Latin gallia for France or perhaps from the Latin gallus for "le coq or cock" because it was discovered in zinc blende by the French chemist Paul-Emile Lecoq de Boisbaudan (Paris, France) in 1875. It was first isolated in 1878 by Lecoq de Boisbaudan and the French chemist Émile-Clément Jungflesch.

Name Derived From

Latin Gallia meaning 'France'

APSIDIUM ©	Created:		2002-06-01		031.pdf
	Page update:		2004-12-12		031.pdf