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mineralogy elements At astatine

At - astatine - METALLOIDS

302°
337°
210
-1
1
3
5
85
At
[Xe] 4f14 5d10 6s2 6p5
2
8
18
32
18
7
2.2
9.3
Synthetic
Radioactive
Liquid
Gaseous
astatine Electronic configuration diagram
Electronic configuration diagram

Name astatine
Number 85
Atomic 210
Symbol At
Fusion 302
Boiling 337
Density 7
Period 6
Group 17
Discovery 1940 Corson et al.
Abundance 0.001
Radius 1.4
Electronegativity 2.2
Ionization 9.3
Number of isotopes 21
Electronic configuration [Xe] 4f14 5d10 6s2 6p5
Oxidation states -1,1,3,5
Electron by energy level 2,8,18,32,18,7