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.
Relevance. Rating Newest Oldest. Best Answer: copper (II) has a valency of +2, and sulfide a valency of -2. so we can say that since one has an excess of 2 electrons (S), and the other has lost two electrons (Cu), a single atom of copper will combine with a single atom of sulfide. we derive the formula: CuS. Source(s): zEnNy Â· 8 years ago.