A substance purely made up of an atom is called an element. Potassium, carbon, and oxygen are the elements present in a molecule of potassium carbonate.
Molecules are the same or different atoms or groups of atoms bonded together by a chemical bond to form a compound. The molecule of potassium carbonate has a formula of [tex]\rm K_{2}CO_{3}.[/tex]
In the molecule, two atoms of potassium (K), three atoms of oxygen (O), and one atom of carbon (C) are present.
Therefore, option H. potassium, carbon, and oxygen are the elements present in the potassium carbonate molecule.
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