A 2.0 kg mass attached to an ideal spring oscillates horizontally with an amplitude of 0.30 m. The spring constant is 85 N/m What is the frequency of the mass's motion? ​

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.