Yttrium

39
Y
Gruppe
3
Periode
5
Blok
d
Protons
Electrons
Neutrons
39
39
50
General Properties
Atomnummer
39
Atommasse
88,90585
Mass Number
89
Kategori
Overgangsmetaller
Farve
Silver
Radioactive
Nej
Named after Ytterby, a village in Sweden near Vauxholm
Krystalstruktur
Simpel Hexagonal
History
In 1787, Carl Axel Arrhenius found a new mineral near Ytterby in Sweden and named it ytterbite, after the village.

Johan Gadolin discovered yttrium's oxide in Arrhenius' sample in 1789, and Anders Gustaf Ekeberg named the new oxide yttria.

Elemental yttrium was first isolated in 1828 by Friedrich Wöhler.
Elektroner i hver skal
2, 8, 18, 9, 2
Elektronkonfiguration
[Kr] 4d1 5s2
Y
Finely divided yttrium is very unstable in air
Physical Properties
Tilstandsform
Fast stof
Massefylde
4,469 g/cm3
Smeltepunkt
1799,15 K | 1526 °C | 2778,8 °F
Kogepunkt
3609,15 K | 3336 °C | 6036,8 °F
Smeltevarme
11,4 kJ/mol
Fordampningsvarme
380 kJ/mol
Varmefylde
0,298 J/g·K
Abundance in Earth's crust
0,0029%
Abundance in Universe
7×10-7%
High
Billede akkrediteringer: Wikimedia Commons (Alchemist-hp)
High purity yttrium
CAS Number
7440-65-5
PubChem CID Number
23993
Atomic Properties
Atomradius
180 pm
Kovalent radius
190 pm
Elektronegativitet
1,22 (Paulings skala)
Ionization Potential
6,2173 eV
Atomic Volume
19,8 cm3/mol
Varmeledningsevne
0,172 W/cm·K
Oxidationstrin
1, 2, 3
Applications
Yttrium is often used in alloys, increasing the strength of aluminum and magnesium alloys.

Yttrium is one of the elements used to make the red color in CRT televisions.

It is also used as a deoxidizer for non-ferrous metals such as vanadium.

Yttrium can be used in laser systems and as a catalyst for ethylene polymerization reactions.
Exposure to yttrium compounds in humans may cause lung disease
Isotoper
Stable Isotopes
89Y
Unstable Isotopes
76Y, 77Y, 78Y, 79Y, 80Y, 81Y, 82Y, 83Y, 84Y, 85Y, 86Y, 87Y, 88Y, 90Y, 91Y, 92Y, 93Y, 94Y, 95Y, 96Y, 97Y, 98Y, 99Y, 100Y, 101Y, 102Y, 103Y, 104Y, 105Y, 106Y, 107Y, 108Y