Q. A Gas used to kill Cancer Cells
A. Helium
B. Radon
C. Krypton
D. Xenon
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Answer:
helium
Explanation:
Helium,from the Greek helios meaning Sun,heads the noble gas series (group 18)in the periodic table.In 1895,British Chemist William was the first to isolate helium by treating the mineral cleveit with mineral acid.
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