two potassium and one oxygen
Explanation:
Oxidation number of K = +1
Oxidation number of O = -2
- During the formation of a compound the elements exchange their combining powers.
- The combining power corresponds to the number of electrons usually gained or lost or shared by atoms of elements during a chemical combination.
- It is also the number of negative and positive charges carried by ions.
This combining power corresponds with the oxidation number given:
K O
Combining power 1 2
Exchange of valencies 2 1
Molecular formula of the compound is K₂O
This shows two atoms of potassium and one atom of oxygen.
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