Itrium

39
Y
Golongan
3
Periode
5
Blok
d
Proton
Elektron
Neutron
39
39
50
Sifat Umum
Nomor atom
39
Massa atom
88,90585
Nomor massa
89
Kategori
Logam transisi
Warna
Perak
Radioaktif
Tidak
Named after Ytterby, a village in Sweden near Vauxholm
Struktur kristal
Segienam Sederhana
Sejarah
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.
Elektron per kulit
2, 8, 18, 9, 2
Konfigurasi elektron
[Kr] 4d1 5s2
Y
Finely divided yttrium is very unstable in air
Sifat Fisika
Fase
Solid
Kepadatan
4,469 g/cm3
Titik lebur
1799,15 K | 1526 °C | 2778,8 °F
Titik didih
3609,15 K | 3336 °C | 6036,8 °F
Kalor peleburan
11,4 kJ/mol
Kalor penguapan
380 kJ/mol
Kapasitas kalor molar
0,298 J/g·K
Kelimpahan di kerak bumi
0,0029%
Kelimpahan di alam semesta
7×10-7%
High
Kredit Gambar: Wikimedia Commons (Alchemist-hp)
High purity yttrium
Nomor CAS
7440-65-5
PubChem CID Number
23993
Sifat Atom
Jari-jari atom
180 pm
Jari-jari kovalen
190 pm
Elektronegativitas
1,22 (Skala Pauling)
Potensi Ionisasi
6,2173 eV
Volume atom
19,8 cm3/mol
Kondusivitas termal
0,172 W/cm·K
Bilangan oksidasi
1, 2, 3
Aplikasi
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
Isotop
Isotop stabil
89Y
Isotop tidak stabil
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