Ra
Radium
ፋይል (_F) 88 · 226.02541 u
Radium is a highly radioactive metal once widely used in luminous paint.
የፊዚክስ ባህሪያት
| አቶሚክ | 226.02541 u |
| ብዛት | 5.5 g/cm³ |
| የቀለም አማራጭ | 973.0 K |
| የሙቀት መጠኑ፦ | 2010.0 K |
| ቅርጽ | Silvery-white metallic |
| የክፍሉ ወቅት | ቀጥ ያለ |
የኬሚካል ባህሪያት
| ሴኮንዶች | 0.9 (ፒየር) |
| ፊደል ሠሌዳው፦ | 509.3 kJ/mol |
| ፊደል ሠሌዳው፦ | 9.65 kJ/mol |
| መተላለፊያ | +2 |
የፊደል ቅርጽ ምርጫዎች
| የኤሌክትሮን ማስተካከያ | [Rn] 7s2 |
| አቶሚክ | 221.0 pm |
| ሬዲየስ | 221.0 pm |
| ቫን ዴር ዋልስ | 283.0 pm |
መከፈት
| የተገኘው በ | Marie Curie, Pierre Curie |
| የምርምር ዓመት | 1898 |
| ቦታ | Paris, France |
| ስም፦ (_N) | Latin 'radius' meaning ray |
ስለ Radium
Radium is a luminous, silvery-white radioactive metal discovered by the Curies. It glows blue due to intense radioactivity. The 'Radium Girls' who painted watch dials suffered tragic radiation poisoning.
ፕሮግራሞች
Formerly used in luminous paint and quack medicine. Now mostly replaced in radiation therapy.
ሐቅ
The 'Radium Girls' who painted luminous watch dials suffered horrific poisoning, leading to landmark workplace safety laws.
ሴኮንዶች
| ብዛት | ብዛት | አራተኛ | ቋሚ |
| 223 | - | 11.43 days | አዎ |
| 224 | - | 3.6319 days | አዎ |
| 226 | - | 1600 years | አዎ |
| 228 | - | 5.75 years | አዎ |
የኤሌክትሮን ማስተካከያ
[Rn] 7s2