Krypton is named after the Greek word that means “secret.” Which explains why krypton was most likely given this name?

Krypton is a noble gas, which is very unreactive and usually exists as individual atoms rather than forming compounds. Because it was difficult to detect and isolate, chemists named it from the Greek word for “hidden” or “secret.” Choice C explains the name; krypton is not a halogen, as choices A and B claim.

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