Periodic table of the elements

Periodic table of the elements

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Eu (Europium)

Tab. 1: Europium

Name of the element:	Europium
Latin name:	Europium
English name:	Europium
French name:	Europium
Symbol:	Eu
Atomic number:	63
Condition at 25 $° C$ :	solid, metal
Frequency (in $ppm$ ):	2.1
Discovered by:	Demarçay (1901)
Electron configuration:	$[Xe] 4 f^{7} 6 s^{2}$
Oxidation states:	+2, +3
Relative atomic mass:	151.97
Electronegativity:	1.01 (Allred)
Atomic radius (in $pm$ ):	204.2
Ionization energy (in $eV {atom}^{-1}$ ):	5.67
Density (in $kg m^{-3}$ ):	5243
Melting temperature (in $K$ ):	1095
Boiling temperature (in $K$ ):	1870

Tab. 2: Isotopes of europium

Mass number	Atomic mass	Frequency /%	Nuclear spin
$151$	$150.9198$	$47.8$	$+ \frac{5}{2}$
$152^{*}$	$151.9217$	$0$	$- 3$
$153$	$152.9212$	$52.2$	$+ \frac{5}{2}$

$^{*}$ Isotope is not stable and decays

Video: Periodic Table of Elements Explained - Metals, Nonmetals, Valence Electrons, Charges (May 2022).