Argon (Ar)
Argon is the third most abundant gas in Earth's atmosphere. Its name means "lazy" in Greek because it doesn't react with other elements.
Properties of Argon
- Atomic number
- 18
- Category
- Noble Gas
- Atomic mass
- 39.948 u
- Electron configuration
- [Ne] 3s² 3p⁶
- Melting point
- 83.81 K (-189.34 °C)
- Boiling point
- 87.3 K (-185.85 °C)
- Density
- 0.0017837 g/cm³
- Appearance
- Colorless gas
- Discovered by
- Lord Rayleigh (1894)
Facts about Argon
- Argon makes up almost 1% of the air you breathe!
- Argon's name means "lazy one" because it doesn't react with anything!
- Argon is used inside light bulbs to keep the filament from burning up!
- Argon glows blue-violet when electricity passes through it!