Итриум

39
Y
Група
3
Периода
5
блок
d
Protons
Electrons
Neutrons
39
39
50
Општи Својства
Атомски број
39
Атомска тежина
88,90585
Mass Number
89
Category
Преоден метал
Color
Silver
Radioactive
Не
Named after Ytterby, a village in Sweden near Vauxholm
Кристална структура
Simple 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.
Electrons per shell
2, 8, 18, 9, 2
Електронска конфигурација
[Kr] 4d1 5s2
Y
Finely divided yttrium is very unstable in air
Физички Својства
Фаза
Solid
Густина
4,469 g/cm3
Точка на топење
1799,15 K | 1526 °C | 2778,8 °F
Точка на вриење
3609,15 K | 3336 °C | 6036,8 °F
Топлина на топење
11,4 kJ/mol
Топлина на испарување
380 kJ/mol
Specific Heat Capacity
0,298 J/g·K
Abundance in Earth's crust
0,0029%
Abundance in Universe
7×10-7%
High
Кредити на слика: Wikimedia Commons (Alchemist-hp)
High purity yttrium
CAS Number
7440-65-5
PubChem CID Number
23993
Атомски Својства
Атомски полупречник
180 pm
Ковалентен полупречник
190 pm
Електронегативност
1,22 (Полингова скала)
Ionization Potential
6,2173 eV
Atomic Volume
19,8 cm3/mol
Thermal Conductivity
0,172 W/cm·K
Oxidation States
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
Isotopes
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