99 Es Einsteinium 252.0 u

Einsteinium

周期
7
族
—
区块
f-区块
相态 (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.

物理属性

原子质量 252.0 u
STP相态 Solid

电子属性

电负性 1.3

电子构型

构型 [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

区块与周期

区块

s p d f

周期

1 2 3 4 5 6 7

元素周期表

镧系元素 锕系元素

更多锕系元素

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 锕系元素.
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.