Einsteinium

Einsteinium,  ₉₉Es

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 Californium ← Einsteinium → Fermium
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

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

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