The US FDA’s proposed rule on laboratory-developed tests: Impacts on clinical laboratory testing

85 polonium ← astatin → radon I ↑ At ↓ Ts Tabel périodik
Katrangan Umum Unsur
Jeneng, Lambang, Nomer atom	astatin, At, 85
Dhèrèt kimia	halogens
Golongan, Période, Blok	17, 6, p
Rupa	black solid (presumed)
Massa atom	(210) g/mol
Konfigurasi elektron	[Xe] 4f14 5d10 6s2 6p5
Cacahing èlèktron saben kulit	2, 8, 18, 32, 18, 7
Ciri-ciri fisik
Fase	solid
Titik lebur	575 K (302 °C, 576 °F)
Titik umob	? 610 K (? 337 °C, ? 639 °F)
Kalor panguapan	ca. 40 kJ/mol
Tekanan uap P/Pa 1 10 100 1 k 10 k 100 k ing T/K 361 392 429 475 531 607
Ciri-ciri atom
Struktur kristal	no data
Bilangan oksidasi	±1, 3, 5, 7
Elektronegativitas	2.2 (skala Pauling)
Energi ionisasi	pertama: 890±40 kJ/mol
Lain-lain
Sifat magnetik	no data
Konduktivitas termal	(300 K) 1.7 W/(m·K)
Nomor CAS	7440-68-8
Isotop
iso NA waktu paruh DM DE (MeV) DP 210At 100% 8.1 h ε, β+ 3.981 210Po α 5.631 206Bi 211At syn 7.2 h
Referensi

Astatine (uniné /ˈæstətiːn/) iku unsur kimia radioaktif kanthi simbul At lan nomer atom 85. Unsur iki minangka halogin kang paling abot.

Pirsani informasi ngenani Astatin ing KamusWiki.

• WebElements.com - Astatine
• Los Alamos National Laboratory - Astatine Archived 2011-01-12 at the Wayback Machine.
• Doc Brown's Chemistry Clinic - Group 7 The Halogens