What is the meaning of microscopy?​

Type the letter that represents the correct location for each particle type below.

An electron moved from shell n = 2 to shell n = 1. what most likely happened during the transition? a fraction of a photon was added. a photon of energy was absorbed. a fraction of a photon was removed. a photon of energy was released.

Which sample at stp has the same number of atoms as 18 liters of ne at stp