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.
Chemical Bonds and Stability. 1  Atoms of most elements are more stable meaning less likely to react when they have 8 valence electrons. e.g. Neon, argon, krypton and xenon all have 8 valence electrons and very unreactive. Some small atoms, such as helium, are stable with just 2 valence electrons. Atoms usually react in a way that makes each atom more stable.