einsteinium
Synthetic actinide series member
Einsteinium is a synthetic radioactive element, atomic number 99, in the actinide series.
It was first identified in debris from the 1952 hydrogen bomb test and named after Albert Einstein.
The element has no practical applications outside scientific research due to its scarcity and instability—it must be produced in nuclear reactors and decays rapidly.
Radioactive metallic element series
- fermiumSynthetic actinide, atomic 100
- californiumSynthetic actinide, number ninety-eight
- berkeliumSynthetic actinide, atomic ninety-seven
- plutoniumActinide, atomic number 94
americium · curium · neptunium · superheavy · transuranium · nuclear reactor · particle accelerator · cyclotron
- Los AlamosNuclear research town
- BerkeleyBay Area university city
- 1952Mid-twentieth century year
- thermonuclearInvolving nuclear fusion heat
hydrogen bomb · debris · fallout · classified · secret · Cold War · Manhattan Project · nuclear testing
Period for fifty-percent reduction
- decayGradual organic breakdown
- alphaFirst Greek letter
- betaGreek alphabet's second letter
- gammaGreek alphabet's third
radiation · isotopes · nuclear · fission · ionizing · emission · particles · dosimeter
Combining power measure
- orbitalRevolving around another
- isotopeElemental variant by mass
- mass numberProtons and neutrons combined
- nucleusCentral controlling part
protons · neutrons · electrons · shell · ground state · ionization · atomic weight · quantum
Pale metallic sheen
- metallicResembling ore-based elements
- softYielding to touch
- reactiveTending to respond
- glowingGiving off steady light
self-heating · luminescent · dense · solid · paramagnetic · oxidation · divalent · trivalent
actinides
Radioactive metallic element series
- fermiumSynthetic actinide, atomic 100
- californiumSynthetic actinide, number ninety-eight
- berkeliumSynthetic actinide, atomic ninety-seven
plutonium · americium · curium · neptunium · superheavy · transuranium · nuclear reactor · particle accelerator · cyclotron
Glenn Seaborg
- Los AlamosNuclear research town
- BerkeleyBay Area university city
- 1952Mid-twentieth century year
thermonuclear · hydrogen bomb · debris · fallout · classified · secret · Cold War · Manhattan Project · nuclear testing
half-life
Period for fifty-percent reduction
gamma · radiation · isotopes · nuclear · fission · ionizing · emission · particles · dosimeter · contamination
valence
Combining power measure
- orbitalRevolving around another
- isotopeElemental variant by mass
- mass numberProtons and neutrons combined
nucleus · protons · neutrons · electrons · shell · ground state · ionization · atomic weight · quantum · energy levels
silvery
Pale metallic sheen
glowing · self-heating · luminescent · dense · solid · paramagnetic · oxidation · divalent · trivalent · crystal structure
- elementsoxygen, hydrogen, carbon, helium, nitrogen
- Synthetic Elementstechnetium, neptunium, plutonium, americium, curium
- Radioactive Elementsuranium, plutonium, radium, radon, thorium
- heavy metalslead, gold, platinum, mercury, uranium
- Actinidesactinium, americium, berkelium, californium, curium
- radioactive materialsuranium, plutonium, radium, thorium, radon