Medication Summary. Topical antibiotics, systemic antibiotics, or a combination of both is effective therapy for impetigo. Empiric bacterial coverage is aimed at eradicating Staphylococcus aureus and group A beta-hemolytic streptococci (GABHS; also known as Streptococcus pyogenes).
In chemistry, the valence or valency of an element is a measure of its combining power with other atoms when it forms chemical compounds or molecules. The concept of valence was developed in the second half of the 19th century and was successful in explaining the molecular structure of inorganic and organic compounds.
By Anne Marie Helmenstine, Ph.D. The words valence and valency have two related meanings in chemistry. 1  Valence describes how easily an atom or radical can combine with other chemical species. 2  This is determined based on the number of electrons that would be added, lost or share if it reacts with other atoms.