Pa
Protactinium is one of the rarest and most expensive naturally occurring elements.
የፊዚክስ ባህሪያት
| አቶሚክ | 231.03588 u |
| ብዛት | 15.37 g/cm³ |
| የቀለም አማራጭ | 1841.0 K |
| የሙቀት መጠኑ፦ | 4300.0 K |
| ቅርጽ | Silvery metallic, bright luster |
| የክፍሉ ወቅት | ቀጥ ያለ |
የኬሚካል ባህሪያት
| ሴኮንዶች | 1.5 (ፒየር) |
| ፊደል ሠሌዳው፦ | 568.0 kJ/mol |
| ፊደል ሠሌዳው፦ | 53.03 kJ/mol |
| መተላለፊያ | +3, +4, +5 |
የፊደል ቅርጽ ምርጫዎች
| የኤሌክትሮን ማስተካከያ | [Rn] 5f2 6d1 7s2 |
| አቶሚክ | 163.0 pm |
| ቫን ዴር ዋልስ | 243.0 pm |
መከፈት
| የተገኘው በ | Kasimir Fajans, Oswald Helmuth Gohring |
| የምርምር ዓመት | 1913 |
| ቦታ | Karlsruhe, Germany |
| ስም፦ (_N) | Greek 'protos' and 'actinium' meaning parent of actinium |
ስለ Protactinium
Protactinium is a dense, silvery-gray radioactive actinide. It produces actinium-227 through decay. It is both toxic and highly radioactive, costing around $280,000 per gram.
ፕሮግራሞች
Scientific research, particularly geochronology (ocean sediment dating).
ሐቅ
Protactinium costs around $280,000 per gram, making it one of the most expensive naturally occurring elements.
ሴኮንዶች
| ብዛት | ብዛት | አራተኛ | ቋሚ |
| 231 | 1.0% | 32,760 years | አዎ |
የኤሌክትሮን ማስተካከያ
[Rn] 5f2 6d1 7s2