Define these terms?

Define these terms:


A. quanta


B. Ground state


C. Excited state

Define these terms?
a. any of the very small increments or parcels into which many forms of energy are subdivided





b. the state of a physical system (as of an atomic nucleus or an atom) having the least energy of all the possible states —called also ground level





c. a state of a physical system (as an atomic nucleus, an atom, or a molecule) that is higher in energy than the ground state