lutetium

| Introduction | History | Other Periodic Tables | Back |

Symbol:

Lu

Atomic Number:

71

Relative Atomic Mass:

174.967 g mol^-1

Natural Abundance in Lithosphere, hydrosphere and atmosphere:

7 x 10^-5% (mass fraction)

Electron Configuration:

[Xe]4f¹⁴5d6s²

Oxidation States:

III

Atomic Radius:

171.8pm

Covalent Radius:

156pm

Ionic Radius:

86pm (for +3 oxidation state, 6 coordinate)

103pm (for +3 oxidation state, 9 coordinate)

Melting Point:

1656°C

Density:

9.84 g cm^-3 (at 20°C)

First Ionisation Energy:

5.426 eV

Reduction Potential:

-2.30V

for Lu³⁺ + 3e^- a Lu_(s)

Electronegativity (Allred and Rochow):

1.1

Number of Natural Isotopes:

2

Mass Number of the Most Abundant Isotopes:

175 g mol^-1 a 97.4% abundance

176 g mol^-1 a 2.6% abundance