P Block Elements Question 270
Question: Helium was discovered by
Options:
A) Crooks
B) Rutherford
C) Frankland and Lockyer
D) Dorn (Dorn is a surname and not a scientific term; if referring to a specific concept, additional context is required for accurate correction.)
Show Answer
Answer:
Correct Answer: C
Solution:
All noble gases except radon occur in the atmosphere. In an atmosphere, ~1% are noble gases among which argon constitutes the majority. Helium and neon are found from radioactive origins. Xenon and radon are rarest elements. Helium was discovered by Janssen and Lockyer in 1868.
BETA
