Np
Neptunium
Ingxenye 93 · 237.04817 u
I-Actinide
f-block
Isikhathi 7
Iqinile ku-RT
I-Radioactive
t½ 2.144 million years
Isingeniso
I-Wikipedia →
I-Neptunium yayiyingxenye yokuqala ye-transuranium etholakele.
Izici Zobuchopho
| I-Atom Mass | 237.04817 u |
| Ubukhulu | 20.45 g/cm³ |
| Izinga lokuncibilika | 917.0 K |
| Izinga lokubopha | 4273.0 K |
| Ukubonakala | Isibhakabhaka esimnyama |
| Isimo ku-Room Temp | Iqinile |
Izici ze-chemical
| Electronegativity | 1.36 (I-Pauling) |
| I-Ionization Energy | 604.5 kJ/mol |
| I-electron affinity | 45.85 kJ/mol |
| I-Oxidation States | +3, +4, +5, +6, +7 |
Izici ze-Atom
| I-electron | [Rn] 5f4 6d1 7s2 |
| I-Atom Radius | 155.0 pm |
| I-Van der Waals Radius | 221.0 pm |
Ukuqapha
| Itholakele ngu | Edwin McMillan, Philip Abelson |
| Unyaka wokuqamba | 1940 |
| Indawo | i-California |
| Ibizwa nge | Ibizwa ngokuthi yiplanethi iNeptune, ngemuva kwe-uranium (Uranus) |
Malunga Neptunium
I-Neptunium iyi-silvery radioactive actinide futhi iyingxenye yokuqala ye-transuranium etholakele. Ikhiqizwa njenge-byproduct e-nuclear reactors.
Izisebenziso
Ukuqapha i-neutron, i-precursor ye-plutonium-238 (i-space probes), kanye nocwaningo lwe-nuclear.
Iqiniso elijabulisayo
I-Neptunium yayiyingxenye yokuqala ye-transuranium eyenziwe ngokwezifiso, evula isango kuzo zonke izinto ezinzima.
Isibonisi
| Inani le-mass | Ubukhulu | Isikhathi esingu-half-life | Iqinile |
| 236 | - | 154,000 years | Akukho |
| 237 | - | 2.144 million years | Akukho |
I-electron
[Rn] 5f4 6d1 7s2