What information can you figure out about an atom using only the atomic number?

How does kepler second law of planetary motion overthrow one of the basic beliefs of classical astronomy

Anurse used a 0.02-mg/l solution of disinfection to clean a patients wound. what is the concentration of the solution expressed as a percentage?

The molecular weight of carbon dioxide, co2, is 44.00 amu, and the molecular weight of nitrous dioxide, no2, is 46.01 amu, so no2 diffuses co2