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.
Oxygen has 6 valence electrons and it needs 2 more electrons to achieve octet. The number of. electrons needed to complete octet is termed as the valency of an element. This value can be obtained. by subtracting the number of valence electrons from octet (8). So, the valency of Oxygen is 2.