A person who has an addiction might do all of the following except . A. Only get the drug from a legitimate doctor B. Use the drug as a coping mechanism C. Engage in risky behavior while under the influence D. Focus mainly on getting and using the drug Please select the best answer from the choices provided A B C D.

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.