Neptuniy
93
Np
Guruh
Nomaʼlum
Davr
7
Block
f
Protonlar
Elektronlar
Neytronlar
93
93
144
General Properties
Atom raqami
93
Atom massasi
[237]
Mass Number
237
Turkum
Aktinoidlar
Ranggi
Silver
Radioaktivlik
Ha
Named after the planet Neptune
Crystal Structure
Simple Orthorhombic
Tarix
Neptunium was the first synthetic transuranium element of the actinide series to be discovered.
Neptunium was first produced by Edwin McMillan and Philip H. Abelson in 1940 at Berkeley Radiation Laboratory of the University of California.
The team produced the neptunium isotope 239Np by bombarding uranium with slow moving neutrons.
Neptunium was first produced by Edwin McMillan and Philip H. Abelson in 1940 at Berkeley Radiation Laboratory of the University of California.
The team produced the neptunium isotope 239Np by bombarding uranium with slow moving neutrons.
Electrons per shell
2, 8, 18, 32, 22, 9, 2
Elektron konfiguratsiyasi
[Rn] 5f4 6d1 7s2
Neptunium is obtained as a by-product from nuclear reactors
Physical Properties
Phase
Qattiq modda
Zichlik
20,45 g/cm3
Erish harorati
910,15 K | 637 °C | 1178,6 °F
Qaynash harorati
4273,15 K | 4000 °C | 7232 °F
Heat of Fusion
10 kJ/mol
Heat of Vaporization
335 kJ/mol
Solishtirma issiqlik sigʻimi
-
Abundance in Earth's crust
Nomaʼlum
Abundance in Universe
Nomaʼlum
CAS Number
7439-99-8
PubChem CID Number
Nomaʼlum
Atomic Properties
Atom radiusi
155 pm
Kovalentlik radiusi
190 pm
Elektrmanfiylik
1,36 (Poling boʻyicha)
Ionization Potential
6,2657 eV
Molyar hajm
11,62 cm3/mol
Issiqlik oʻtkazuvchanlik
0,063 W/cm·K
Oksidlanish darajasi
3, 4, 5, 6, 7
Applications
Neptunium is used mainly for research purposes.
When bombarded with neutrons 237Np is used to produce 238Pu which is used for spacecraft generators and terrestrial navigation beacons.
237Np is used in devices for detecting high-energy neutrons.
When bombarded with neutrons 237Np is used to produce 238Pu which is used for spacecraft generators and terrestrial navigation beacons.
237Np is used in devices for detecting high-energy neutrons.
Neptunium is harmful due to its radioactivity
Izotoplar
Barqaror izotoplar
-Beqaror izotoplar
225Np, 226Np, 227Np, 228Np, 229Np, 230Np, 231Np, 232Np, 233Np, 234Np, 235Np, 236Np, 237Np, 238Np, 239Np, 240Np, 241Np, 242Np, 243Np, 244Np