Catabolic processes involve degradation of complex molecules into simpler molecules with the net release of chemical energy.
A molecule is a group of two or more atoms held together by attractive forces known as chemical bonds. Depending on the context, the term may or may not include ions that meet this criterion.
A group of two or more atoms of the same or different elements chemically bonded together is called a molecule. For example, two hydrogen atoms and one oxygen atom react to form a water molecule.
Water is a simple molecule with one oxygen atom bonded to two different hydrogen atoms. The bond is a polar covalent bond (polar bond) due to the high electronegativity of the oxygen atom.
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