an atom contains
a. an equal number of protons and electrons in a nucleus orbited by a number of neutrons equal to the number of protons
b. a number of protons in a nucleus orbited by the same number of electorns and the same number of neutrons
c. a number of neutrons in a nucleus orbited by the same number of protons and the same number of electrons
d. protons and neutrons in a nucleus by electrons equal to the number of protons
e. equal nunbers of protons and nuetrons in the nucleus orbited by varying numbers of electrons
