Ra
Radium
Qaybta 88 · 226.02541 u
Alkaline Earth Metal
s-block
Waqtiga 7
_Dhaqdhaqaaq 2
Cidhiidhi at RT
Radioactive
t½ 1600 years
Wikipedia →
Radium waa metal aad u radioactive mar loo isticmaalo si ballaaran in paint iftiinka.
Eeg astaamaha
| Atomic mass | 226.02541 u |
| Cidhiidhi | 5.5 g/cm³ |
| Natiijooyinka | 973.0 K |
| Natiijooyinka | 2010.0 K |
| Muuqaalka | Madow oo fidsan oo bir ah |
| Xaaladda heerkulka qolka | Cidhiidhi |
Eegista
| Electronegativity | 0.9 (Pauling) |
| 1st Ionization | 509.3 kJ/mol |
| Istaraatiijiyad | 9.65 kJ/mol |
| Nidaamka | +2 |
_Cusub:
| Nidaamka | [Rn] 7s2 |
| Awooda | 221.0 pm |
| Xaraf | 221.0 pm |
| Van der Waals | 283.0 pm |
Dib u eegista
| La Ogaaday | Marie Curie, Pierre Curie |
| Sannadka la helay | 1898 |
| _Meel | Paris, Faransiiska |
| Magacaabista | Laanqayrta Cas |
_Warbixinta Radium
Radium waa mid iftiin leh, silvery-caddaan radioactive metal la helay by Curies. Waxay u muuqataa buluug sababtoo ah radioactivity xoog leh. The 'Radium Girls' oo farshaxanka dials watch ku dhacay sunta raadiyaha tragic.
Barnaamijyada
Hore loo isticmaali jiray in pencil iftiin iyo dawada quack. Hadda inta badan lagu bedelay daaweynta rayadka.
Xaqiiqo xiiso leh
'Radium Girls' oo farta ku fiiqay saacadaha iftiinka leh ayaa la ildaran xanuun aad u xun, taasoo keentay sharciyo amniga shaqada ah.
Isotoobyo
| Tirada | Tirada | Half-Life | Xasiloon |
| 223 | - | 11.43 days | Ha |
| 224 | - | 3.6319 days | Ha |
| 226 | - | 1600 years | Ha |
| 228 | - | 5.75 years | Ha |
Nidaamka
[Rn] 7s2