A colorless, odorless gas element that is one of the noble gases and is used in certain types of lightbulbs and lasers.
From Greek 'kryptos' meaning 'hidden,' because it was extremely difficult to discover and isolate in the atmosphere. Scientists named it this because it was so hard to find and detect.
Krypton is famous as Superman's home planet, but the real element is named 'krypton' because it was literally invisible and hidden in Earth's atmosphere for millions of years before chemists finally found it in 1898!
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