A solution contains 3.8 10–2m in al3+and 0.29 m in naf. if the kffor alf63–is 7 1019, how much aluminum ion remains at equilibrium?

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.