93 Np Neptunium 237.0 u

Neptunium

周期
7
族
—
区块
f-区块
相态 (STP)
Solid

Neptunium was the first synthetic transuranium element, named after the planet Neptune. It is a byproduct in nuclear reactors.

About Neptunium

Neptunium was the first transuranium element to be made artificially, and the naming followed the sequence of the outer planets: the element beyond uranium took the name of the planet beyond Uranus. It holds atomic number 93 and a relative atomic mass of 237.0, with the configuration [Rn] 5f4 6d1 7s2 and an electronegativity of 1.36. The metal is solid under standard conditions and belongs to the actinide series of period 7. In practice, neptunium arises chiefly as a byproduct of reactor operation, formed when uranium fuel captures neutrons without undergoing fission. Its long-lived isotope is consequently a significant component of the actinide inventory that has to be accounted for in spent-fuel management.

物理属性

原子质量 237.0 u
STP相态 Solid

电子属性

电负性 1.36

电子构型

构型 [Rn] 5f⁴ 6d¹ 7s²

Electron Shell Configuration

Neptunium electron shell configuration Np 2e⁻ 8e⁻ 18e⁻ 32e⁻ 22e⁻ 9e⁻ 2e⁻
Electron shell structure of Neptunium — electrons per shell.
Shell Electrons
1 (K) 2
2 (L) 8
3 (M) 18
4 (N) 32
5 (O) 22
6 (P) 9
7 (Q) 2

Position in Periodic Table

Neptunium position in the periodic table Np

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

含Np的反应

Americium-241 Alpha Decay

²⁴¹Am → ²³⁷Np + ⁴He

Nuclear

更多锕系元素

89 Ac Actinium 90 Th Thorium 91 Pa Protactinium 92 U Uranium 94 Pu Plutonium 95 Am Americium 96 Cm Curium 97 Bk Berkelium 98 Cf Californium 99 Es Einsteinium

Frequently Asked Questions

What is Neptunium?
Neptunium (Np) is a chemical element with atomic number 93. It is a solid at standard temperature and pressure, classified as a 锕系元素.
What are the key properties of Neptunium?
Neptunium has an atomic mass of 237.0 u.
What is the electron configuration of Neptunium?
The electron configuration of Neptunium is [Rn] 5f4 6d1 7s2. It is in the f-block of the periodic table.
What is the electronegativity of Neptunium?
Neptunium has an electronegativity of 1.36 on the Pauling scale.