If you did this lab i ned major , also i think that my atomic mass for each isotope is wrong since they are all the you need more info let me know

the objects have the same charge is correct.

nathan lee

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.