21 Sc Scandium 44,956 u

Scandium

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Chu kỳ
4
Nhóm
3
Khối
d-khối
Pha (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.

Ngoại quan: Silvery white

Tính chất vật lý

Khối lượng nguyên tử 44.956 u
Mật độ 2.985 g/cm³
Điểm nóng chảy 1540.8 °C
Điểm sôi 2835.8 °C
Pha ở STP Solid
Bán kính nguyên tử 184.0 pm

Tính chất điện tử

Độ âm điện 1.36
Năng lượng ion hóa 633.1 eV
Ái lực electron 18.1 eV
Electron hóa trị 3

Cấu hình electron

Cấu hình [Ar] 3d¹ 4s²

Electron Shell Configuration

Scandium electron shell configuration Sc 2e⁻ 8e⁻ 9e⁻ 2e⁻

Position in Periodic Table

Scandium position in the periodic table Sc

Khám phá

Được phát hiện bởi: Lars Fredrik Nilson
Năm: 1879

Khối & Chu kỳ

Chu kỳ

Bảng tuần hoàn

Lanthanide Actinide

Thêm Kim Loại Chuyển Tiếp

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 kim loại chuyển tiếp.
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.