Lu

Lutetium · element 71

Lanthanide · Solid at room temperature

Lutetium is a chemical element with symbol Lu and atomic number 71. It is a silvery white metal, which resists corrosion in dry, but not in moist air. It is considered the first element of the 6th-period transition metals and the last element in the lanthanide series, and is traditionally counted among the rare earths.

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1 cm Big Piece of Pure Lutetium
1 cm Big Piece of Pure Lutetium - Jurii, CC BY 3.0 <https://creativecommons.org/licenses/by/3.0>, via Wikimedia Commons, source: https://images-of-elements.com/lutetium.php

Key facts

Atomic mass
174.96681 u
how heavy one atom is
Phase (room temp.)
Solid
Density
9.841 g/cm³
how tightly packed it is
Melting point
1925 K (1652 °C)
when solid turns to liquid
Boiling point
3675 K (3402 °C)
when liquid turns to gas
Period
6
its row in the periodic table
Group
3
its column in the periodic table
Block
D-block
the neighbourhood it lives in
Electronegativity
1.27
how strongly it pulls electrons
Electron configuration
[Xe] 4f14 5d1 6s2
where its electrons live
Shells
2 · 8 · 18 · 32 · 9 · 2
electrons in each layer, inside to out
Discovered by
Georges Urbain
who found it
Appearance
silvery white
what it looks like

Source: Wikipedia

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