Avogadro constant. In chemistry and physics, the Avogadro constant (named after the scientist Amedeo Avogadro) is the number of constituent particles, usually atoms or molecules, that are contained in the amount of substance given by one mole. Thus, it is the proportionality factor that relates the molar mass of a compound to the mass of a sample.
Medical assistants held about 591,300 jobs in 2014. Most of these assistants work in physiciansâ offices, hospitals, outpatient clinics, and other healthcare facilities.
Medical assistants take vital signs, maintain records and schedule appointments in hospitals, physicians' offices and other health-care settings. Some medical assistants perform clinical tasks, such as taking X-rays or giving injections, depending on their qualifications and state law.