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.
For many elements, the valence of the element is equal to the number of unpaired valence electrons, as shown in the Lewis symbol of the element. An atom, with 2 unpaired electrons has a valence of two and forms two bonds.The valences derived from the number of unpaired electrons are the normal or expected valences of the elements. However, some elements display a valence other than the normal valence.For example, when tin and chlorine react, one of two different products may form.he valences derived from the number of unpaired electrons are the normal or expected valences of the elements. However, some elements display a valence other than the normal valence. For example, when tin and chlorine react, one of two different products may form.