Basic Properties
Symbol: Es
Atomic number: 99
Atomic weight: {252}
Group name: Actinoid
Period in periodic table: 7 (actinoid)
Block in periodic table: f-block
Ground state electron configuration: Rn.5f11.7s2

Physical Properties
Standard state: solid at 298 K
Colour: unknown, but probably metallic and silvery white or grey in appearance
Molar volume (/cm3): 28.52
Melting point (/K): 1133 or 860 °C (1580°F)

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