Question

select the correct balanced formula for potassium oxide
○ ko₂
○ k₂o
○ ko
○ k₃o₂

Explanation:

Step1: Determine the oxidation states

Potassium (\(K\)) has an oxidation state of \(+1\) (since it is in Group 1 of the periodic table). Oxygen (\(O\)) has an oxidation state of \(-2\) (common oxidation state for oxygen in oxides).

Step2: Use the criss - cross method

To balance the charges, we need 2 potassium ions (\(K^{+}\)) for every 1 oxide ion (\(O^{2 -}\)). So the formula is \(K_{2}O\).

Answer:

\(K_{2}O\) (the second option)