saraaneedsshelpp saraaneedsshelpp 26-09-2021 Chemistry contestada The structure of an atom is defined by two numbers: the proton (atomic) number and the mass (nucleon) number. What is the electronic configuration of an atom with proton number 5 and mass number 11? A 2,8,1 B 3,2 C 2,3 D 1,8,2