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Are sodium and potassium stored underwater?

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Heck No! They are stored under anhydrous (dry) mineral oil, which looks like water but it is NOT water! read more

Potassium, sodium and lithium can be cut easily using a blade. These fresh cut surfaces appear shiny and silvery, but can turn dull quickly from the reaction with oxygen. Group one metals all react in a vigorous manner with water to form a metal oxide and hydrogen. read more

Unlike lithium and sodium, however, potassium should not be stored under oil indefinitely. If stored longer than 6 months to a year, dangerous shock-sensitive peroxides can form on the metal and under the lid of the container, which can detonate upon opening. read more

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