Question

Why is pottasium high reactive than gold
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Answer 1

SINCE THE POTASSIUM HAVE LEAST NUCLEAR NORCE OF ATTRACTION BETWEEN THE NUCLEUS AND ELECTRONS, WHEREAS NULEUS OF GOLD IS VERY LARGE IT CREATE A STRONG FORCE OF ATTRATION BETWEEN THE ELECTRONS AND ITSELF HENCE IT DO NOT LOSE ELECTRON EASILY AND IS LEAST REACTIVE.

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Answer 2

Answer:

When you look at the reactivity series you'll see that pottasium (K) sits on top of the reactivity series i.e. its the most reactive and Gold i.e Au sits at the bottom of the series. Because of one being the most reactive metal and one being the least reactive, there's high reactivity.

(You can understand this by taking the example of adding boiling water to liquid nitrogen which results in a blast.)