Question

which alkali metal react with water most vigorously.​

Answer 1

Answer:

Lithium sodium and potassium all react vigorously with water. Alkali metals need to be stored under oil to prevent them reacting with the oxygen and water vapor in the air. The reactivity of the alkali metals increases down the group. Potassium reacts more vigorously than sodium and lithium is the least reactive.

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Answer 2

Francium is a chemical element with symbol Fr and atomic number 87. It used to be known as eka-caesium and actinium K. It is the second-least electronegative element, behind only caesium. Francium is a highly radioactive metal that decays into astatine, radium, and radon.

There is no actually experiment done but scientists believe that it could react with it with less than 10ns and explosion is equal to 69 atomic bombs