Weegy: Answer: five User: . One twelfth the mass of a carbon-12 atom is used to define a(n) (1 point)atomic number.
atomic mass unit.
User: . Mendeleev arranged the known chemical elements in a table according to increasing (1 point)atomic number.
number of electrons.
number of protons.
User: . Which of the following provides the best analogy for an electron in an atomic orbital? (1 point)a bee ... (More)