Question

What does Francium + Water yield?

Answer 1

Hint: We have to remember that the francium is an atomic number $87$ chemical element with the symbol $Fr$. Eka-caesium was the name given to it until it was discovered. It is highly radioactive, with a half-life of just $22$ minutes for the most stable isotope, francium-$223$. It is the second most electropositive metal after caesium, and the second rarest naturally occurring element after lithium (after astatine). Francium isotopes degrade rapidly into astatine, radium, and radon.

Complete answer:
We have to know that the francium is one of the most unstable naturally occurring elements, with a half-life of just $22$ minutes for the longest isotope, francium-$223$. The only equivalent element is astatine, which has a half-life of $56$ seconds for the most stable natural isotope, astatine-$219$ (the alpha daughter of francium-$223$), but a half-life of $8.1$ hours for synthetic astatine-$210$. Both francium isotopes degrade into astatine, radium, or radon. The longest-lived isotope of each synthetic element up to and including element $105$, dubnium, has a shorter half-life than francium-$223$.
When francium is allowed to react with water, the francium would disintegrate, while the water reaction would release hydrogen gas, francium hydroxide, and a lot of heat. Radioactive content will contaminate the entire environment.

Note:
We must be noted that francium is an alkali metal of group $1$ of the periodic table. The heaviest chemical element in Group $1$ (Ia) of the periodic table, the alkali metal group, is francium (Fr). It only appears in toxic forms with a brief half-life. Just $24.5$grammes ($0.86$ounce) of natural francium exist at any given moment in the entire Earth's crust, so it can't be separated in visible, weighable quantities. Francium has no commercial uses due to its volatility and rarity. It has been used in the fields of chemistry and atomic structure for scientific purposes. Its usefulness as a screening tool for a variety of cancers has also been investigated, but this use has been ruled out.