At
Astatine
Chikamu 85 · 209.98715 u
Reactive Nonmetal
p- block
Chikamu 6
_Group 17
_Kukanganisa: at RT
Radioactive
t½ 8.1 hours
Wikipedia →
Astatine ndiyo inonyanya kuwanikwa nenyama yezvinhu panyika.
Maitiro ekushandisa
| Atomic radius: | 209.98715 u |
| Kuomarara | 7.0 g/cm³ |
| Kutonhora Point | 575.0 K |
| Kutonhora Point | 610.0 K |
| Kuoneka | Kuita |
| State at Room Temp | _Kukanganisa: |
Chemical zvinhu
| Electronegativity | 2.2 (Pauling) |
| 1st Ionization Energy | 899.0 kJ/mol |
| Electronegativity: | 270.1 kJ/mol |
| Oxygen | -1, +1, +3, +5, +7 |
Atomic Properties
| Kuisa Kugadzirisa | [Xe] 4f14 5d10 6s2 6p5 |
| Atomic radius: | 150.0 pm |
| Covalent Radius | 150.0 pm |
| Van der Waals radius | 202.0 pm |
Discovery
| Yakawanikwa ne | Dale R. Corson, Kenneth Ross MacKenzie, Emilio Segre |
| Kuonekwa kwegore | 1940 |
| _Panzvimbo: | Berkeley, California, USA |
| Akapihwa zita mushure me | ChiGreek 'astatos' chinoreva kuti hachigadzikane |
Nezve Astatine
Astatine isiri yakanakisisa, radioactive, uye yakanyanya kuoma halogen. Kupfuura 30 magiramu ari mu Earth's crust chero nguva.Iye kamwe kamwe haasi kuonekwa mu bulk.
Mashandisiro & Maapplication
Potential targeted cancer therapy (astatine-211), still experimental.
Nhoroondo yemitambo
Astatine hachisi chinhu chinogona kuonekwa nemeso - pane zvishoma kupfuura 30 gramu munyika yose panguva imwecheteyo.
Isotopes
| Mamwe marudzi ezvinyorwa | Kuwanda | Half-Life | _Kuchengeta |
| 209 | - | 5.41 hours | Hapana |
| 210 | - | 8.1 hours | Hapana |
| 211 | - | 7.214 hours | Hapana |
Kuisa Kugadzirisa
[Xe] 4f14 5d10 6s2 6p5