Arsenic
Elemental State As
Electron Configuration 1s22s22p63s23p63d104s24p3
First Ionization Potential 9.789 eV
Electron Affinity 0.81 eV
Z* 7.449 (Clementi-Raimondi)
Pauling Electronegativity 2.18
Covalent Radius 1.20 Å
Metallic Radius  
Ionic Radius 0.72 Å As3+ coordination number = 6

0.475 Å As5+ coordination number = 4

0.60 Å As5+ coordination number = 6

van der Waal's Radius 1.85 Å
Melting Point 817 oC (28 atm, gray)
Boiling Point 614 oC sublimes
Density 1.97 g/cm3 (yellow)

5.73 g/cm3 (gray)

Other Properties