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Argon, Ar
Atomic Number: 18 Atomic Mass: 40 Number of Protons: 18 Number of Neutrons: 22 Number of Electrons: 18 Melting Point: -189.35 oC Boling Point: -185.85 oC Density: 1.78 g/L
Argon is $2.80 to $4 a liter.
Discovered By: Lord Raleigh and Sir William Ramsay in 1894
Uses: *in electric light bulbs and in fluorescent tubes *used as a inert gas for welding and cutting *in dating rocks *arc welding, steel making, and electronics manufacturing *protective atmosphere for growing silicon, and germanium crystals
Orgin of name: argos- inactive (Greek)
Classification: Nonmetal
