# What does Francium + water yield?

Francium is an alkali metal with atomic number $87$. It is estimated that there is no more than one ounce $\left(\approx 28 \text{g}\right)$ of francium in the earth's crust at any given time. Francium is radioactive and its most stable isotope, francium-223, has a half-life of about 22 minutes. Scientists might hypothesize that francium would react extremely vigorously with water, producing hydrogen gas and francium hydroxide, but currently that is not possible to test.