103 Lr Lawrencium 266.0 u

Lawrencium

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周期
7
族
—
区块
d-区块
相态 (STP)
Solid

Lawrencium is the last element in the actinide series, named after Ernest O. Lawrence. It has the shortest half-life of any actinide.

About Lawrencium

Lawrencium closes the actinide series at atomic number 103, and no member of that series decays faster; its half-life is the shortest of the fourteen. Named for Ernest O. Lawrence, the inventor of the cyclotron, it has a relative atomic mass of 266.0 and an electronegativity of 1.3, and is a solid under standard conditions. Its configuration, [Rn] 5f14 7s2 7p1, is notable in its own right: the outermost electron occupies a 7p orbital rather than the 6d orbital that simple periodic reasoning would predict, a departure attributed to relativistic effects on the innermost electrons of so heavy an atom. On that basis some classifications assign the element to the d-block.

物理属性

原子质量 266.0 u
STP相态 Solid

电子属性

电负性 1.3

电子构型

构型 [Rn] 5f¹⁴ 7s² 7p¹

Electron Shell Configuration

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

Position in Periodic Table

Lawrencium position in the periodic table Lr

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 Lawrencium?
Lawrencium (Lr) is a chemical element with atomic number 103. It is a solid at standard temperature and pressure, classified as a 锕系元素.
What are the key properties of Lawrencium?
Lawrencium has an atomic mass of 266.0 u.
What is the electron configuration of Lawrencium?
The electron configuration of Lawrencium is [Rn] 5f14 7s2 7p1. It is in the d-block of the periodic table.
What is the electronegativity of Lawrencium?
Lawrencium has an electronegativity of 1.3 on the Pauling scale.