Eu

Europium · element 63

Lanthanide · Solid at room temperature

Europium is a chemical element with symbol Eu and atomic number 63. It was isolated in 1901 and is named after the continent of Europe. It is a moderately hard, silvery metal which readily oxidizes in air and water.

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Weakly Oxidized Europium, hence slightly yellowish. 1.5 grams, large piece 0.6 x 1.6 cm.
Weakly Oxidized Europium, hence slightly yellowish. 1.5 grams, large piece 0.6 x 1.6 cm. - Jurii, CC BY 3.0 <https://creativecommons.org/licenses/by/3.0>, via Wikimedia Commons, source: https://images-of-elements.com/europium.php

Key facts

Atomic mass
151.9641 u
how heavy one atom is
Phase (room temp.)
Solid
Density
5.264 g/cm³
how tightly packed it is
Melting point
1099 K (826 °C)
when solid turns to liquid
Boiling point
1802 K (1529 °C)
when liquid turns to gas
Period
6
its row in the periodic table
Group
3
its column in the periodic table
Block
F-block
the neighbourhood it lives in
Electronegativity
1.2
how strongly it pulls electrons
Electron configuration
[Xe] 4f7 6s2
where its electrons live
Shells
2 · 8 · 18 · 25 · 8 · 2
electrons in each layer, inside to out
Discovered by
Eugène-Anatole Demarçay
who found it

Source: Wikipedia

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