Skandium

21
Sc
Golongan
3
Periode
4
Blok
d
Proton
Elektron
Neutron
21
21
24
Sifat Umum
Nomor atom
21
Massa atom
44,955912
Nomor massa
45
Kategori
Logam transisi
Warna
Perak
Radioaktif
Tidak
From the Latin word Scandia, Scandinavia
Struktur kristal
Segienam Sederhana
Sejarah
In 1879, Lars Fredrik Nilson and his team detected scandium in the minerals euxenite and gadolinite.

Nilson prepared 2 grams of scandium oxide of high purity.

Per Teodor Cleve showed that scandium had properties similar to those predicted by Mendeleev for eka-boron.

Metallic scandium was first prepared in 1937 by Fischer and his colleagues.
Elektron per kulit
2, 8, 9, 2
Konfigurasi elektron
[Ar] 3d1 4s2
Sc
The stable form of scandium is created in supernovas via the r-process
Sifat Fisika
Fase
Solid
Kepadatan
2,989 g/cm3
Titik lebur
1814,15 K | 1541 °C | 2805,8 °F
Titik didih
3109,15 K | 2836 °C | 5136,8 °F
Kalor peleburan
16 kJ/mol
Kalor penguapan
318 kJ/mol
Kapasitas kalor molar
0,568 J/g·K
Kelimpahan di kerak bumi
0,0026%
Kelimpahan di alam semesta
3×10-6%
Ultrapure
Kredit Gambar: Images-of-elements
Ultrapure crystalline scandium
Nomor CAS
7440-20-2
PubChem CID Number
23952
Sifat Atom
Jari-jari atom
162 pm
Jari-jari kovalen
170 pm
Elektronegativitas
1,36 (Skala Pauling)
Potensi Ionisasi
6,5615 eV
Volume atom
15,0 cm3/mol
Kondusivitas termal
0,158 W/cm·K
Bilangan oksidasi
1, 2, 3
Aplikasi
Scandium is used in sports equipment such as golf iron shafts, baseball bats, bicycle frames and fishing rods.

Scandium iodide, along with sodium iodide, when added to a modified form of mercury-vapor lamp, produces a form of metal halide lamp.

The radioactive isotope 46Sc is used in oil refineries as a tracing agent.
Scandium is considered to be of low toxicity
Isotop
Isotop stabil
45Sc
Isotop tidak stabil
36Sc, 37Sc, 38Sc, 39Sc, 40Sc, 41Sc, 42Sc, 43Sc, 44Sc, 46Sc, 47Sc, 48Sc, 49Sc, 50Sc, 51Sc, 52Sc, 53Sc, 54Sc, 55Sc, 56Sc, 57Sc, 58Sc, 59Sc, 60Sc