What is the atomic mass of argon?

Basic Information. Name: Argon Symbol: Ar Atomic Number: 18. Atomic Mass: 39.948 amu. Melting Point: -189.3 °C (83.85 K, -308.74 °F) Boiling Point: -186.0 °C (87.15 K, -302.8 °F) Number of Protons/Electrons: 18. Number of Neutrons: 22. Classification: Noble Gas Crystal Structure: Cubic Density @ 293 K: 1.784 g/cm3 read more

Argon is a chemical element with symbol Ar and atomic number 18. It is in group 18 of the periodic table and is a noble gas. Argon is the third-most abundant gas in the Earth's atmosphere, at 0.934% (9340 ppmv). read more

Argon: Symbol: Ar: Atomic Number: 18: Atomic Mass: 39.948 atomic mass units: Number of Protons: 18: Number of Neutrons: 22: Number of Electrons: 18: Melting Point read more