JAMB - Chemistry (2000 - No. 40)
The least easily oxidized of the metals below is?
Ca
Na
Zn
Al
Vysvetlenie
The activity series is a type of ordering system for elements, which ranks how reactive a certain element is in relation to other elements.
The order of reactivity of metals is as follows, Potassium > Sodium > Lithium > Calcium > Magnesium > Aluminium > Zinc > Iron > Copper >