At
I-Astat
Ingxenye 85 · 209.98715 u
I-Reactive Nonmetal
p-block
Isikhathi 6
Iqembu 17
Iqinile ku-RT
I-Radioactive
t½ 8.1 hours
I-Wikipedia →
I-astatine iyingxenye encane kakhulu etholakala ngokwemvelo emhlabeni.
Izici Zobuchopho
| I-Atom Mass | 209.98715 u |
| Ubukhulu | 7.0 g/cm³ |
| Izinga lokuncibilika | 575.0 K |
| Izinga lokubopha | 610.0 K |
| Ukubonakala | Kubukeka sengathi yi-metallic |
| Isimo ku-Room Temp | Iqinile |
Izici ze-chemical
| Electronegativity | 2.2 (I-Pauling) |
| I-Ionization Energy | 899.0 kJ/mol |
| I-electron affinity | 270.1 kJ/mol |
| I-Oxidation States | -1, +1, +3, +5, +7 |
Izici ze-Atom
| I-electron | [Xe] 4f14 5d10 6s2 6p5 |
| I-Atom Radius | 150.0 pm |
| I-Covalent Radius | 150.0 pm |
| I-Van der Waals Radius | 202.0 pm |
Ukuqapha
| Itholakele ngu | Dale R. Corson, Kenneth Ross MacKenzie, Emilio Segre |
| Unyaka wokuqamba | 1940 |
| Indawo | i-California |
| Ibizwa nge | isiGreki 'astatos' isho ukungazinzi |
Malunga I-Astat
I-astatine iyinto encane kakhulu, esebenza nge-radioactive, futhi iyi-halogen enzima kakhulu eyaziwayo. Kuncane kunama-gramu angama-30 akhona eqhwa leplanethi nganoma yisiphi isikhathi. Ayikho ebonakala ngokugcwele.
Izisebenziso
Ukwelashwa kwesifo sikashukela esihlobene ne-astatine-211, okwamanje kungakapheli ukuhlolwa.
Iqiniso elijabulisayo
Astatine ayikho ebonakala ngemehlo amnyama - kukhona ngaphantsi kwe-30 amagramu emhlabeni wonke nganoma yisiphi isikhathi.
Isibonisi
| Inani le-mass | Ubukhulu | Isikhathi esingu-half-life | Iqinile |
| 209 | - | 5.41 hours | Akukho |
| 210 | - | 8.1 hours | Akukho |
| 211 | - | 7.214 hours | Akukho |
I-electron
[Xe] 4f14 5d10 6s2 6p5