What gas did Rayleigh discover?
Argon
Neon
Helium
Oxygen
Answer
Argon, discovered by Lord Rayleigh, is a colorless, odorless, and tasteless noble gas. It is the third most abundant element in the Earth's atmosphere, after nitrogen and oxygen, and constitutes about 0.93% of its volume. Argon is used in a variety of applications, including incandescent light bulbs, fluorescent tubes, and lasers. It is also used as a shielding gas in welding and metalworking.
John Strutt, 3rd Baron Rayleigh Brain Challenge: 31 Questions to Push Your Limits
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