72 Hf Hafnium 178,49 u

Hafnium

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Período
6
Grupo
4
Bloco
d-bloco
Fase (STP)
Solid

Hafnium is a corrosion-resistant transition metal used in nuclear reactor control rods. It is chemically similar to zirconium.

About Hafnium

Hafnium (Hf) is a lustrous, corrosion-resistant transition metal, element 72, opening group 4 of period 6 in the d-block. It has an atomic mass of 178.49, the electron configuration [Xe] 4f¹⁴ 5d² 6s², and a Pauling electronegativity of 1.3. Chemically it closely resembles zirconium, the element directly above it, and the two are notoriously difficult to separate. Hafnium's strong absorption of neutrons makes it well suited to the control rods that regulate nuclear reactors, particularly in naval propulsion. The metal is solid at standard conditions and forms a very stable oxide used in advanced semiconductor insulation.

Propriedades físicas

Massa atômica 178.49 u
Fase em STP Solid

Propriedades eletrônicas

Eletronegatividade 1.3

Configuração eletrônica

Configuração [Xe] 4f¹⁴ 5d² 6s²

Electron Shell Configuration

Hafnium electron shell configuration Hf 2e⁻ 8e⁻ 18e⁻ 32e⁻ 10e⁻ 2e⁻
Electron shell structure of Hafnium — electrons per shell.
Shell Electrons
1 (K) 2
2 (L) 8
3 (M) 18
4 (N) 32
5 (O) 10
6 (P) 2

Position in Periodic Table

Hafnium position in the periodic table Hf

Bloco e período

Bloco

s p d f

Período

1 2 3 4 5 6 7

Tabela Periódica

Lantanídeos Actinídeos

Mais Metal de Transição

21 Sc Scandium 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

Frequently Asked Questions

What is Hafnium?
Hafnium (Hf) is a chemical element with atomic number 72. It is a solid at standard temperature and pressure, classified as a metal de transição.
What are the key properties of Hafnium?
Hafnium has an atomic mass of 178.49 u.
What is the electron configuration of Hafnium?
The electron configuration of Hafnium is [Xe] 4f14 5d2 6s2. It is in the d-block of the periodic table.
What is the electronegativity of Hafnium?
Hafnium has an electronegativity of 1.3 on the Pauling scale.