27 Co Cobalt 58.933 u

Cobalt

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คาบ
4
หมู่
9
บล็อก
d-บล็อก
สถานะ (STP)
Solid

Cobalt is a hard, lustrous transition metal used in superalloys and blue pigments. It is a key component of lithium-ion batteries and vitamin B12.

ลักษณะ: Hard, lustrous, bluish-gray

About Cobalt

Long prized for the deep blue it gives to glass and ceramics, cobalt is a hard, lustrous, bluish-gray transition metal of atomic number 27 and atomic mass 58.933. It has a density of 8.9 g/cm³ and a melting point of 1768 K. Its [Ar] 3d7 4s2 configuration gives an electronegativity of 1.88 and a first ionization energy of 760 kJ/mol. Georg Brandt first isolated the metal in 1735. Cobalt is used in heat-resistant superalloys and blue pigments, and it is a key component of lithium-ion batteries and of vitamin B12. The element belongs to group 9, period 4.

คุณสมบัติทางกายภาพ

มวลอะตอม 58.933 u
ความหนาแน่น 8.9 g/cm³
จุดหลอมเหลว 1494.8 °C
จุดเดือด 2926.8 °C
สถานะที่ STP Solid
รัศมีอะตอม 152.0 pm

คุณสมบัติทางอิเล็กทรอนิกส์

อิเล็กโทรเนกาติวิตี 1.88
พลังงานไอออไนเซชัน 760.4 eV
อิเล็กตรอนแอฟฟินิตี 63.7 eV
อิเล็กตรอนวาเลนซ์ 9

การจัดเรียงอิเล็กตรอน

การกำหนดค่า [Ar] 3d⁷ 4s²

Electron Shell Configuration

Cobalt electron shell configuration Co 2e⁻ 8e⁻ 15e⁻ 2e⁻
Electron shell structure of Cobalt — electrons per shell.
Shell Electrons
1 (K) 2
2 (L) 8
3 (M) 15
4 (N) 2

Position in Periodic Table

Cobalt position in the periodic table Co

การค้นพบ

ค้นพบโดย: Georg Brandt
ปี: 1735

Compounds Containing Cobalt

Frequently Asked Questions

What is Cobalt?
Cobalt (Co) is a chemical element with atomic number 27. It is a solid at standard temperature and pressure, classified as a โลหะแทรนซิชัน.
What are the key properties of Cobalt?
Cobalt has an atomic mass of 58.933 u, density of 8.9 g/cm³, melting point of 1494.8°C, boiling point of 2926.8°C.
What is the electron configuration of Cobalt?
The electron configuration of Cobalt is [Ar] 3d7 4s2. It is in the d-block of the periodic table.
Who discovered Cobalt?
Cobalt was discovered by Georg Brandt in 1735.
What is the electronegativity of Cobalt?
Cobalt has an electronegativity of 1.88 on the Pauling scale.