osmium
Densest natural metal
Osmium is a dense metallic element, the heaviest naturally occurring substance.
It belongs to the platinum group of metals and has industrial uses in alloys requiring extreme hardness and durability, such as fountain pen tips and electrical contacts.
Osmium is twice as dense as lead.
Occurring at intervals
- iridiumElement seventy-seven
- platinumDense precious silvery metal
- rutheniumRare metallic element, number forty-four
- rhodiumPlatinum group element
palladium · rhenium · tungsten · atomic · chemistry · refractory · rare · isotope
Most tightly concentrated
- heavyOf great mass
- weightyHeavy or significant
- massiveExtremely large and heavy
- compactTightly packed together
solid · ponderous · leaden · substantial · hefty · gravitational · incompressible · sinker
Cool neutral color
- steel-blueGray-toned blue shade
- silveryPale metallic sheen
- gunmetalBluish-gray bronze alloy
- pewterTin-based tableware alloy
slate · lustrous · sheen · polished · gleaming · reflective · shiny · glossy
Electron-accepting reactant
- volatileLiable to sudden change
- hazardousLikely to cause injury
- poisonousCapable of causing death
- corrosiveDestroys by chemical action
fumes · inhalation · oxidation · reactive · staining · irritant · toxic
Applying dye or pigment
- microscopyTechnique using powerful lenses
- filamentVery thin thread
- tipEnd or gratuity
- precisionAccuracy of measurement
Liable to shatter
inflexible · stiff · unyielding · crystalline · refractory · high-melting · durable · wear-resistant
periodic
Occurring at intervals
- iridiumElement seventy-seven
- platinumDense precious silvery metal
- rutheniumRare metallic element, number forty-four
rhodium · palladium · rhenium · tungsten · atomic · chemistry · refractory · rare · isotope · extraction
densest
Most tightly concentrated
compact · solid · ponderous · leaden · substantial · hefty · gravitational · incompressible · sinker · counterweight
blue-gray
Cool neutral color
- steel-blueGray-toned blue shade
- silveryPale metallic sheen
- gunmetalBluish-gray bronze alloy
pewter · slate · lustrous · sheen · polished · gleaming · reflective · shiny · glossy · bright
oxidizer
Electron-accepting reactant
corrosive · fumes · inhalation · oxidation · reactive · staining · irritant · toxic
staining
Applying dye or pigment
- microscopyTechnique using powerful lenses
- filamentVery thin thread
- tipEnd or gratuity
brittle
Liable to shatter
crack · inflexible · stiff · unyielding · crystalline · refractory · high-melting · durable · wear-resistant · scratch-resistant