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: The most [[Stable Isotope|stable isotope]] of [[Francium]] has 136 [[neutron]]s in its [[Atomic Nucleus|nucleus]] giving it an [[Relative Atomic Mass|atomic mass]] of 223.
: An [[atom]] of [[Francium]] has only 1 [[electron]] in its [[Outer Shell|outer shell]].
: [[Francium]] [[ion]]s have lost an [[electron]] to become [[Positive ChargedCharge|positively charged]].
====Properties====
: [[Francium]] is the most [[Reactivity|reactive]] [[Alkali Metal|alkali metal]].
: [[Francium]] does not exist in nature but has been produced in small quantities in [[Particle Accelerator|particle accelerators]].
: [[Francium]] would [[Chemical Reaction|react]] strongly with [[water]] to produce [[Hydrogen]] [[gas]] and Francium Hydroxide.