The Element Helium Was First Discovered and Identified as a Separate

question 149

Multiple Choice

The element helium was first discovered and identified as a separate element

• A) in natural gas originating underground, from the spectrum emitted from a flame of burning natural gas.
• B) in rocks containing radioactively decaying elements such as uranium.
• C) on the Sun, from the emitted spectrum from its upper atmosphere.
• D) inside meteorites that had come from outer space.