Discover Questions

What is the radius of the electron orbit of a hydrogen atom for n=2 in nanometers? For each of the following five cycles state two processes in which matter changes it's form: carbon, phosphorus, nitrogen, oxygen and sulfur? A mole of bromine atoms has a mass of how many grams? A mole of bromine molecules has a mass of how many grams? How we calculate bond length? A mole of bromine molecules contains how many molecules? How many atoms?