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76 Transition Metal
Os

Osmium

RIS 0.002
Velocity +0.000
Rank#82
Co-citedRu

Osmium (Os) is a transition metal with atomic number 76: a neutral osmium atom has 76 protons and 76 electrons. Atomic mass 190.23 u, electron configuration [Xe] 4f14 5d6 6s2. Osmium is the densest naturally occurring element at 22.587 g/cm3.

Physical properties
Atomic mass 190.23 u
Category Transition Metal
Block d-block
State Solid
Config [Xe] 4f14 5d6 6s2
Electronegativity 2.2
Density 22.587 g/cm³
Melting 3306.0 K
Boiling 5285.0 K
Ionization 840.0 kJ/mol
Oxidation +2, +3, +4, +6, +8
Discovered 1803 · Smithson Tennant
Osmium's history

Research intensity over time

Research communities behind this literature

Groups of papers that cite each other densely, with the share of Osmium's tracked research in each.