The least easily oxidized of the metals below is?
...The least easily oxidized of the metals below is?
Ca
Na
Zn
Al
Correct answer is C
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 >
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