If two electrons in the same atom have the same value of "l", they are if two electrons in the same atom have the same value of "l", they are in the same orbital. in the same level, but different sublevel. in the same sublevel, but not necessarily in the same level. in different levels and in different shaped orbitals. none of the above.

answer: atomic mass was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

explanation:

originally atomic mass was used to arrange elements on the periodic table from left to right in a row. each column then shows similar properties of elements of a group.

in modern periodic table, the atoms are arranged in increasing atomic number. as atomic number represents the number of protons in an atom which is unique for every atom.