Np
Neptunium
ፋይል (_F) 93 · 237.04817 u
Neptunium was the first transuranium element discovered.
የፊዚክስ ባህሪያት
| አቶሚክ | 237.04817 u |
| ብዛት | 20.45 g/cm³ |
| የቀለም አማራጭ | 917.0 K |
| የሙቀት መጠኑ፦ | 4273.0 K |
| ቅርጽ | Silvery metallic |
| የክፍሉ ወቅት | ቀጥ ያለ |
የኬሚካል ባህሪያት
| ሴኮንዶች | 1.36 (ፒየር) |
| ፊደል ሠሌዳው፦ | 604.5 kJ/mol |
| ፊደል ሠሌዳው፦ | 45.85 kJ/mol |
| መተላለፊያ | +3, +4, +5, +6, +7 |
የፊደል ቅርጽ ምርጫዎች
| የኤሌክትሮን ማስተካከያ | [Rn] 5f4 6d1 7s2 |
| አቶሚክ | 155.0 pm |
| ቫን ዴር ዋልስ | 221.0 pm |
መከፈት
| የተገኘው በ | Edwin McMillan, Philip Abelson |
| የምርምር ዓመት | 1940 |
| ቦታ | Berkeley, California, USA |
| ስም፦ (_N) | Named after the planet Neptune, following uranium (Uranus) |
ስለ Neptunium
Neptunium is a silvery radioactive actinide and the first transuranium element discovered. It is produced as a byproduct in nuclear reactors.
ፕሮግራሞች
Neutron detection, precursor for plutonium-238 (space probes), and nuclear research.
ሐቅ
Neptunium was the first synthetic transuranium element, opening the door to all heavier elements.
ሴኮንዶች
| ብዛት | ብዛት | አራተኛ | ቋሚ |
| 236 | - | 154,000 years | አዎ |
| 237 | - | 2.144 million years | አዎ |
የኤሌክትሮን ማስተካከያ
[Rn] 5f4 6d1 7s2