What is astatine



Half-life for At-210 *):8.1 hours

Astatine is the halogen with the highest density;
but only small amounts are available.Nucleon number *)   
Atomic number   
Melting point   
boiling point   
Oxidation numbers   
density   
Hardness (Mohs)   
Electronegativity   
Electron config.   
Natural frequency  
   
*) most durable
isotope
 
  210     
85     
302 ° C **)   
370 ° C **)   
7, 5, −1     
8.75 g / cm³ **)   
not specified   
2.20 (Pauling)     
[Xe] 4f145d106s26p5    
At-215 tracks   
At-216 lanes   
At-218 tracks   
At-219 tracks 
  
**) Values ​​estimated