Einsteinium

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Einsteinium,  99Es
Einsteinium.jpg
A 300 microgram sample of Einsteinium, glowing in the dark.
General properties
Name, symbol Einsteinium, Es
Appearance Metallic. Glows blue in the dark.
Einsteinium in the periodic table
Ho

Es

Upt
CaliforniumEinsteiniumFermium
Atomic number 99
Standard atomic weight (Ar)
Group, block n/a; f-block
Period period 7
Electron configuration [Rn] 5f11 7s2
per shell
2, 8, 18, 32, 29, 8, 2
Physical properties
Phase Solid
Melting point 1133 K ​(860 °C, ​1580 °F)
Boiling point 1269 K ​(996 °C, ​1825 °F) (Estimated)
Density near r.t. 8.84 g/cm3
Atomic properties
Oxidation states +2, +3, +4
Electronegativity Pauling scale: 1.3
energies 1st: 619 kJ/mol
Miscellanea
Magnetic ordering paramagnetic
CAS Registry Number 7429-92-7
History
Discovery Lawrence Berkeley National Laboratory (1952)
Named by after Albert Einstein
· references

Einsteinium is an extremely radioactive element. It's very close to impossible to obtain this element in a hobby or even a professional laboratory.

Properties

Chemical

Physical

Availability

To do

Isolation

To do

Projects

  • Element collection

Handling

Safety

Einsteinium is extremely radioactive. Any sort of contact or exposition will more likely than not lead to radiation poisoning.

Storage

Store in a thick lead container.

Disposal

To do

References

Relevant Sciencemadness threads