Astato

Astatine
85At
I ↑ At ↓ Uus Periodic table polonium ← astatine → radon
Panagway
unknown, but probably a black solid; possibly metallic in appearance
Kinatibuk-ang mga kinaiya
Ngalan, simbolo, kaiphan	astatine, At, 85
Paglitok	/ˈæstətiːn/ [[Help:Pronunciation respelling key|Plantilya:Smallcaps all-tə-teen]] or /ˈæstətɪn/ [[Help:Pronunciation respelling key|Plantilya:Smallcaps all-tə-tin]]
Kategoriyang elemento	halogen sometimes classified as a metalloid (disputed)
Group, period, block	17, 6, p
Gibug-aton sa atomo	(210)
Kontorno sa elektron	[Xe] 4f14 5d10 6s2 6p5 2, 8, 18, 32, 18, 7 Electron shells of astatine (2, 8, 18, 32, 18, 7)
History
Pagkadiskobre	Dale R. Corson, Kenneth Ross MacKenzie, Emilio Segrè (1940)
Physical properties
Phase	magahi
Melting point	575 K, 302 °C, 576 °F
Boiling point	610 K, 337 °C, 639 °F
Heat of vaporization	(At2) 54.39 kJ·mol−1
Vapor pressure
P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 361 392 429 475 531 607
Atomic properties
Oxidation states	−1, +1, +3, +5, +7
Electronegativity	2.2 (Pauling scale)
Ionization energies	1st: 887.7±38.59 kJ·mol−1
Covalent radius	150 pm
Van der Waals radius	202 pm
Miscellanea
Magnetic ordering	no data
Thermal conductivity	1.7 W·m−1·K−1
CAS registry number	7440-68-8
Most stable isotopes
Main article: Isotopes of astatine
iso NA half-life DM DE (MeV) DP 209At syn 5.41 h βべーた+ 3.486 209Po αあるふぁ 5.758 205Bi 210At syn 8.1 h βべーた+ 3.981 210Po αあるふぁ 5.632 206Bi 211At syn 7.21 h εいぷしろん 0.786 211Po αあるふぁ 5.983 207Bi

Ang astato (Iningles astatine) mao ang elementong kimiko sa talaang peryodiko nga may simbolo nga At ug kaiphan nga atomik 85. Ang astato mao ang halogen.

Galeriya sa hulagway

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