| Eegenskapen |
|---|
|
| Algemian |
|---|
| Nööm, Symbool, Numer | Neptuunium, Np, 93 |
| Seerie | Aktinoid |
| Skööl, Periode, Blook | Ac,7, f |
| Klöör, Skak | salwern |
| CAS-Numer | 7439-99-8 |
| Uundial | 4 · 10−14 ppm[1] |
| Atomaar[2] |
|---|
| Atoommase | 237,0482u |
| Atoomraadius (bereegent) | (α-Np) 130 ()pm |
| Elektroonen | [Rn] 5f4 6d1 7s2 |
| 1. Ionisiarang | 604,5kJ/mol |
| Füsikaalisk[2] |
|---|
| Tustant | fest |
| Feranrangen | 3 |
| Kristal | orthorhombisk |
| Sachthaid | 20,45 g/cm3 |
| Smoltponkt | 912K (639[3] °C) |
| Köögponkt | 4175 K[3]K (3902 °C) |
| Molaar Rüm | 11,59 · 10−6 m3/mol |
| Dampwaremk | 1420 kJ/mol[1] kJ/mol |
| Smoltwaremk | 39,91[1] kJ/mol |
| Elektrisk struumfeerang | 0,82 A/(V · m) bi 293[1] K |
| Waremkfeerang | 6,30W/(m · K) bi 300[1] K |
| Cheemisk[2] |
|---|
| Oksidatsionstustant | +3, +4,+5, +6, +7 |
| Normoolpotentiaal | −1,79 V
(Np3+ + 3 e− → Np) |
| Elektronegatiwiteet | 1,36 (Pauling-Skala) |
| Isotoopen |
|---|
| Isotoop | NH | t1/2 | Aktiwiteet | Energii (MeV) | Produkt |
|---|
| 235Np | {syn.} | 396,1d | α | 5,192 | 231Pa | | ε | 0,124 | 235U | | 236Np | {syn.} | 1,54 · 105a | ε | 0,940 | 236U | | β− | 0,490 | 236Pu | | α | 5,020 | 232Pa | | 237Np | {syn.} | 2,144 · 106a | α | 4,959 | 233Pa | | 238Np | {syn.} | 2,117d | β− | | 238Pu | | 239Np | {syn.} | 2,355d | β− | | 239Pu |
|
| Muar isotoopen biList faan isotoopen |
|---|
| Seekerhaid |
|---|
|
| Muar wäärnangen |
|---|
| Radioaktiif |
|---|
 Radioaktiif
Radioaktiif element |
|---|
| Miast wurdSI-ianhaiden brükt. |
