Sunday, February 8, 2009

Parys Z.

Element: Argon
Smbol: Ar
Atomic Number: 18
Mass Number: 40
Melting Point:-189.35 C
Boiling Point:-185.85 C
Normal Phase: gas
Element Family: Noble gas
Name of discoverer and date: Sir William Ramsey and Lord Rayleigh in 1894

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