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.
The metal valence in the solid phase, determined by the number of the metal atoms joined to one atom, is also sharply different from the nonmetal valence. For example, the first group elements valence in the gaseous phase is constant and equal 1, but in the solid phase it is either 8 or 12.