Symbol: Fr

Atomic Number: 87

Atomic Weight: (223)

Francium has the symbol Fr and is under number 87 in the periodic table. It used to be known as actinium K and eka caesium and has a metallic color. The chemical properties of francium resemble those of caesium. It is the least electronegative of all the elements in the periodic table, meaning that its atoms are very, very unlikely to attract electrons and thus form negative ions. This is due to the distance of its electrons from the nucleus and its atomic number. What is more, francium is the rarest element that occurs in nature but one. The most...Read More