Electronic data		Thermal data		Steric data
Shells: 2,8,18,9,2 Orbitals: [Kr] 4d1 5s2 Electronegativity: 1.1, 1.2 1. Ionization potential: 6.217 eV 2. Ionization potential: 12.24 eV 3. Ionization potential: 20.52 eV Oxidation states: 3 Electrical conductivity: 0.0166 10^6		Melting point: 1522 °C ±8 Boiling point: 3338 °C Specific heat: 0.30 J/gK Heat of fusion: 11.40 kJ/mol Heat of vaporization: 363.0 kJ/mol Thermal conductivity: 0.172 W/cmK		Atomic radius: 2.27 Å Ionic radius: 1.02 Å () Covalent radius: 1.62 Å Atomic volume: 19.8 cm³/mol Density (293 K): 4.47 g/cm³ Crystal structure: Hexagonal

Nuclide	Abundance [%]	Mass	Spin	Halflife	Decay mode	Decay tree
86Y	0	86	4	14.74h	EC,+	View
87Y	0	86.911	1/2	3.35d	EC,+	View
88Y	0	87.91	4	106.6d	EC,+	View
89Y	100	88.9058	1/2	--	stable	--
89Ym	0	89	0	15.7s	IT	View
90Y	0	90	2	2.67d	-	View
90Ym	0	90	7	3.19h	IT	View
91Y	0	90.907	1/2	58.51d	-	View
91Ym	0	91	9/2	49.71m	IT	View
92Y	0	92	2	3.54h	-	View
93Y	0	93	1/2	10.2h	-	View

Legend

Name origin:	From the Swedish village, Ytterby, where one of its minerals was first found
Description:	Silvery, ductile, fairly reactive metal.
Discovered by:	Johann Gadolin
Year:	1789
Place:	Finland
Sources:	Found in minerals such as monazite, xenotime, and yttria.
Use(s):	Combined with europium to make red phosphors for color TV's. Yttrium oxide and iron oxide combine to form a crystal garnet used in radar.