You have a 100. ml of a 0.25 M K2SO4 stock solution, what would be the new Molarity be if you diluted the solution to make a 200 ml solution? *

a corroding iron, if that's one of your choices

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.