Ra
i-Radium
Ingxenye 88 · 226.02541 u
I-Alkali Earth Metal
s-block
Isikhathi 7
Iqembu 2
Iqinile ku-RT
I-Radioactive
t½ 1600 years
I-Wikipedia →
I-radium iyinsimbi enamandla amakhulu e-radioactive esetshenziswa kabanzi ekuphileni kwe-luminous paint.
Izici Zobuchopho
| I-Atom Mass | 226.02541 u |
| Ubukhulu | 5.5 g/cm³ |
| Izinga lokuncibilika | 973.0 K |
| Izinga lokubopha | 2010.0 K |
| Ukubonakala | Isibhakabhaka-simhlophe esimnyama |
| Isimo ku-Room Temp | Iqinile |
Izici ze-chemical
| Electronegativity | 0.9 (I-Pauling) |
| I-Ionization Energy | 509.3 kJ/mol |
| I-electron affinity | 9.65 kJ/mol |
| I-Oxidation States | +2 |
Izici ze-Atom
| I-electron | [Rn] 7s2 |
| I-Atom Radius | 221.0 pm |
| I-Covalent Radius | 221.0 pm |
| I-Van der Waals Radius | 283.0 pm |
Ukuqapha
| Itholakele ngu | Marie Curie, Pierre Curie |
| Unyaka wokuqamba | 1898 |
| Indawo | i-Paris, i-France |
| Ibizwa nge | Latin 'radius' meaning ray |
Malunga i-Radium
I-radium iyinsimbi ekhanyayo, emhlophe emhlophe ekhanyayo etholakala yi-Curies. Ikhanya ngombala obomvu ngenxa ye-radioactivity enamandla. Ama-'Radium Girls' adweba ama-dials wewatch wahlupheka ngenxa yokudlwengula okubi.
Izisebenziso
Kusetshenziswa ngaphambilini ekuphileni kwemibala ekhanyayo kanye nemithi ye-quack. Manje kushintshwe kakhulu ekwelashwa kwe-radiation.
Iqiniso elijabulisayo
I-'Radium Girls' abazobopha ama-dail ewatchwatch akhanyayo bahlupheka ngokudlwengula okubuhlungu, okuholela ekubeni kube khona umthetho obalulekile wokuphepha emisebenzini.
Isibonisi
| Inani le-mass | Ubukhulu | Isikhathi esingu-half-life | Iqinile |
| 223 | - | 11.43 days | Akukho |
| 224 | - | 3.6319 days | Akukho |
| 226 | - | 1600 years | Akukho |
| 228 | - | 5.75 years | Akukho |
I-electron
[Rn] 7s2