Symbol
Es
Atomic Number
99
Atomic Mass
252
Protons
99
Neutrons
153
Electrons
99
Type
Actinide
Isotopes
Einsteinium-253
Discovery Year
1952
Discovered By
Albert Ghiorso, Glenn T. Seaborg, and others
Group
3
Period
7
Boiling Point
Unknown
Melting Point
860°C
Electron Configuration
[Rn] 7s² 5f¹⁰
Density (g/cm³)
8.84
Crystal Structure
Cubic
Magnetism
Paramagnetic
Abundance in Earth's Crust
Trace
Phase at Room Temperature
Solid