21 Sc Scandium 44,956 u

Scandium

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Periode
4
Golongan
3
Blok
d-blok
Fase (STP)
Solid

Scandium is a soft, silvery transition metal used in aerospace alloys. It is relatively rare and was predicted by Mendeleev before its discovery.

Penampilan: Silvery white

About Scandium

Predicted by Dmitri Mendeleev before it was found, scandium was isolated by Lars Fredrik Nilson in 1879, confirming a gap in the periodic table. It is a soft, silvery-white transition metal of atomic number 21 and atomic mass 44.956 that melts at 1814 K. Its configuration [Ar] 3d1 4s2 places the first d-electron of the transition series, with an electronegativity of 1.36 and a first ionization energy of 633 kJ/mol. Relatively rare and hard to isolate, scandium is used chiefly in high-performance aerospace alloys, where small additions improve strength. It stands at the head of group 3, period 4.

Sifat Fisika

Massa Atom 44.956 u
Kerapatan 2.985 g/cm³
Titik Lebur 1540.8 °C
Titik Didih 2835.8 °C
Fase pada STP Solid
Jari-jari Atom 184.0 pm

Sifat Elektronik

Keelektronegatifan 1.36
Energi Ionisasi 633.1 eV
Afinitas Elektron 18.1 eV
Elektron Valensi 3

Konfigurasi Elektron

Konfigurasi [Ar] 3d¹ 4s²

Electron Shell Configuration

Scandium electron shell configuration Sc 2e⁻ 8e⁻ 9e⁻ 2e⁻
Electron shell structure of Scandium — electrons per shell.
Shell Electrons
1 (K) 2
2 (L) 8
3 (M) 9
4 (N) 2

Position in Periodic Table

Scandium position in the periodic table Sc

Penemuan

Ditemukan oleh: Lars Fredrik Nilson
Tahun: 1879

Blok & Periode

Blok

s p d f

Periode

1 2 3 4 5 6 7

Tabel Periodik

Lantanida Aktinida

Lebih banyak Logam Transisi

22 Ti Titanium 23 V Vanadium 24 Cr Chromium 25 Mn Manganese 26 Fe Iron 27 Co Cobalt 28 Ni Nickel 29 Cu Copper 30 Zn Zinc 39 Y Yttrium

Frequently Asked Questions

What is Scandium?
Scandium (Sc) is a chemical element with atomic number 21. It is a solid at standard temperature and pressure, classified as a logam transisi.
What are the key properties of Scandium?
Scandium has an atomic mass of 44.956 u, density of 2.985 g/cm³, melting point of 1540.8°C, boiling point of 2835.8°C.
What is the electron configuration of Scandium?
The electron configuration of Scandium is [Ar] 3d1 4s2. It is in the d-block of the periodic table.
Who discovered Scandium?
Scandium was discovered by Lars Fredrik Nilson in 1879.
What is the electronegativity of Scandium?
Scandium has an electronegativity of 1.36 on the Pauling scale.