Ra
Radium
Zosankha 88 · 226.02541 u
Alkaline Earth Metal
s-block
Mphindi 7
_Grupu 2
M'gululi pa RT
Radioactive
t½ 1600 years
Wikipedia →
Radium ndi chitsulo chosagwira kwambiri chomwe chimagwiritsa ntchito kwambiri pazokongoletsa zowala.
Zochita za Fiziki
| Mafuta | 226.02541 u |
| Kuwala | 5.5 g/cm³ |
| Kutentha | 973.0 K |
| Kutentha | 2010.0 K |
| Kuoneka | Silvery- white metallic |
| State at Room Temp | M'gululi |
Makhalidwe a Chemical
| Electronegativity | 0.9 (Pauling) |
| 1st Ionization Energy | 509.3 kJ/mol |
| Electron Affinity | 9.65 kJ/mol |
| Oxygen | +2 |
Zosankha
| Kusintha kwa ma electron | [Rn] 7s2 |
| Atomic radius | 221.0 pm |
| Covalent Radius | 221.0 pm |
| Kuwala kwa Van der Waals | 283.0 pm |
Kupeza
| Kupezeka ndi | Marie Curie, Pierre Curie |
| Kuzindikira chaka | 1898 |
| Malo | Paris, France |
| Analimbikitsidwa ndi | Latin 'radius' kutanthauza ray |
Za ine Radium
Radium ndi chitsulo chowala, chofiira-chinyezimiro chomwe chimadziwika ndi Curies. Imakhala yofiira chifukwa cha radioactivity yolimba. "Radium Girls" omwe amapanga zowonera za watchwatches adakumana ndi matenda a radiation.
Kugwiritsa ntchito & Maphunziro
Poyamba amagwiritsa ntchito pazokongoletsa zobiriwira ndi mankhwala a quack. Tsopano amasinthidwa kwambiri pa radiation therapy.
Fun Facts
"Radium Girls" omwe adapanga mawatch a luminous adakumana ndi kupweteka kwakukulu, komwe kunabweretsa malamulo oteteza malo ogwira ntchito.
Isotopes
| Kukula kwa maselo | Kuchuluka | Half-Life | Wolimba |
| 223 | - | 11.43 days | Si |
| 224 | - | 3.6319 days | Si |
| 226 | - | 1600 years | Si |
| 228 | - | 5.75 years | Si |
Kusintha kwa ma electron
[Rn] 7s2