The reactivity of metals increases from right to left because metals are electropositive in nature.
Metals react by electron loss. The more reactive metals are able to loose electron easily. However, the ability of metals to loose electrons decreases from left to right. This means that as you move towards the right, metals steadily loose the ability to loose electrons easily.
As a result of this, the reactivity of metals increases from right to left as we move towards those metals that loose electrons easily.
<em>Why does metal reactivity increase as you move from right to left on the periodic table? That is why as you go up a group Chemical Reactivity increases </em>
<h3><u>because it is easier for elements to gain electrons when they have high electronegativity.</u></h3>
