How do you know which element is the most reactive in the periodic table?

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Meave60 Share
Oct 11, 2014

The periodic trend of reactivity depends on whether the elements are metals or nonmetals.

For metals, reactivity increases down a group and from right to left across a period.

Nonmetals do the opposite. For nonmetals, reactivity increases up a group and from left to right across a period.

https://jahschem.wikispaces.com/chemical+activity

Francium is the most reactive metal, and fluorine is the most reactive nonmetal.

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