99 Es Einsteinium 252,0 u

Einsteinium

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Periode
7
Gruppe
—
Block
f-Block
Phase (STP)
Solid

Einsteinium was discovered in the fallout of the first hydrogen bomb test. It is named after Albert Einstein.

About Einsteinium

Debris from the first hydrogen bomb test yielded the earliest samples of einsteinium, the element having formed in the intense neutron flux of the explosion and been recovered from the fallout afterwards. It is named for Albert Einstein and carries atomic number 99 with a relative atomic mass of 252.0. The configuration [Rn] 5f11 7s2 places it deep in the actinide series of period 7, and its electronegativity is 1.3; it is a solid under standard conditions. Einsteinium is synthetic, intensely radioactive, and available only in quantities far too small for any application beyond laboratory study. What chemistry is known has been established on samples measured in micrograms or less.

Physikalische Eigenschaften

Atommasse 252.0 u
Phase bei STP Solid

Elektronische Eigenschaften

Elektronegativität 1.3

Elektronenkonfiguration

Konfiguration [Rn] 5f¹¹ 7s²

Electron Shell Configuration

Einsteinium electron shell configuration Es 2e⁻ 8e⁻ 18e⁻ 32e⁻ 29e⁻ 8e⁻ 2e⁻
Electron shell structure of Einsteinium — electrons per shell.
Shell Electrons
1 (K) 2
2 (L) 8
3 (M) 18
4 (N) 32
5 (O) 29
6 (P) 8
7 (Q) 2

Position in Periodic Table

Einsteinium position in the periodic table Es

Block & Periode

Block

s p d f

Periode

1 2 3 4 5 6 7

Periodensystem

Lanthanide Actinide

Mehr Actinoid

89 Ac Actinium 90 Th Thorium 91 Pa Protactinium 92 U Uranium 93 Np Neptunium 94 Pu Plutonium 95 Am Americium 96 Cm Curium 97 Bk Berkelium 98 Cf Californium

Frequently Asked Questions

What is Einsteinium?
Einsteinium (Es) is a chemical element with atomic number 99. It is a solid at standard temperature and pressure, classified as a actinoid.
What are the key properties of Einsteinium?
Einsteinium has an atomic mass of 252.0 u.
What is the electron configuration of Einsteinium?
The electron configuration of Einsteinium is [Rn] 5f11 7s2. It is in the f-block of the periodic table.
What is the electronegativity of Einsteinium?
Einsteinium has an electronegativity of 1.3 on the Pauling scale.