What are the most reactive metals?

1 Answer
Meave60
May 7, 2015

The most reactive metals are the group 1 or alkali metals. Their reactivity increases down the group. The metal cesium is the most reactive metal as determined by experiments. Francium might be the most reactive metal, but there is not enough francium to be observed and experimented with. There are only about 20 g to 30 g in the earth's crust at any given time, and it is very radioactive. The half-life of its longest lasting isotope is 22 minutes.

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