Question

identify the most reactive and least reactive metals : AL, K, Ca, Au

Answer 1

K is the most reactive metal
Au is the least reactive metal

Answer 2

Answer:

Least reactive: Gold (Au)

Most reactive: Potassium (k)

Explanation:

Calcium or potassium which are present on top of the reactivity series are highly reactive metals as they can displace metals present below and can evolve hydrogen gas by reacting with mineral acids like HCl etc.

Chemically, gold(Au) is a transition metal and a group 11 element. It is one of the least reactive chemical elements and is solid under standard conditions.