99 Es 252

Einsteinium

actinide · Group 3 · Period 7

5 section(s) thin

Atomic properties

Atomic number
99
Z
Atomic weight
252[1]
g/mol
Density
8.84 g/cm³
at STP
Melting point
860 °C
at 1 atm
Boiling point
996 °C
at 1 atm
Crystal structure
FCC
Electron config.
[Rn] 5f¹¹ 7s²
Oxidation states
+3
most common

Market data

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References

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Coverage notes

The following sections are thin or absent in the source document for this element. They will be filled by enrichment passes (NIST atomic, OSHA/NIOSH safety, USGS / IAI environmental).