
Argon is the 18th element of the periodic table. These argon facts contain chemical and physical data along with general information and history. Basic Argon Facts Name: Argon Atomic Number: 18 Element Symbol: Ar Group: 18 Period: 3 Block: p Element Family: Noble Gas Atomic Mass: 39.948(1) Electron Configuration: [Ne]3s23p6 (shorthand) or 1s22s22p63s23p6 (full) Discovery: Lord Rayleigh and Sir William Ramsay in 1894 Rayleigh noticed a […]