76 Os Osmium 190,23 u

Osmium

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Période
6
Groupe
8
Bloc
d-bloc
Phase (STP)
Solid

Osmium is the densest naturally occurring element. It is used in fountain pen nibs, electrical contacts, and as a staining agent in microscopy.

About Osmium

Denser than any other naturally occurring element, osmium (Os) is a hard, brittle, bluish-white member of the platinum group. Element 76 lies in group 8 of period 6 in the d-block, with an atomic mass of 190.23, the electron configuration [Xe] 4f¹⁴ 5d⁶ 6s², and a Pauling electronegativity of 2.2. Its extreme hardness led to historic use in the tips of fountain-pen nibs and in durable electrical contacts, while osmium tetroxide is a valuable staining agent in electron microscopy. The metal is solid at standard conditions and, though usually alloyed with other platinum-group metals, is prized wherever exceptional wear resistance is required.

Propriétés physiques

Masse atomique 190.23 u
Phase à STP Solid

Propriétés électroniques

Électronégativité 2.2

Configuration électronique

Configuration [Xe] 4f¹⁴ 5d⁶ 6s²

Electron Shell Configuration

Osmium electron shell configuration Os 2e⁻ 8e⁻ 18e⁻ 32e⁻ 14e⁻ 2e⁻
Electron shell structure of Osmium — electrons per shell.
Shell Electrons
1 (K) 2
2 (L) 8
3 (M) 18
4 (N) 32
5 (O) 14
6 (P) 2

Position in Periodic Table

Osmium position in the periodic table Os

Bloc et période

Bloc

s p d f

Période

1 2 3 4 5 6 7

Tableau périodique

Lanthanides Actinides

Compounds Containing Osmium

Osmium Tetroxide

OsO₄

Plus de Métal de Transition

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 Osmium?
Osmium (Os) is a chemical element with atomic number 76. It is a solid at standard temperature and pressure, classified as a métal de transition.
What are the key properties of Osmium?
Osmium has an atomic mass of 190.23 u.
What is the electron configuration of Osmium?
The electron configuration of Osmium is [Xe] 4f14 5d6 6s2. It is in the d-block of the periodic table.
What is the electronegativity of Osmium?
Osmium has an electronegativity of 2.2 on the Pauling scale.