Periodic Table of Elements: Arsenic

Symbol: As Atomic number: 33 Electron configuration: [Ar] 3d¹⁰4s²4p³ Discovered: 1250 Melting point: 1,502°F (816.8°C) Atomic mass: 74.9216 u CAS ID: 7440-38-2 Mineral forms of arsenic were known as early as the fourth century BC, but the German scholastic Albertus Magnus is usually accredited with the discovery of the element around 1250.

5% initial proceeds and royalties plants trees J2B token holders get 15% off of our Store, contact to redeem.

Plant trees Support Artists Save The World With Art™