If E° for X + e– → Y is larger than E° for A + 2e– → B, then in a spontaneous process under standard-state conditions, which element will be oxidized ?

i believe the answer is a.

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.