Dung dịch Y gồm Al 3 + Fe2 + 0,05 mol Na + 0,1 mol SO4 2 - 0,15 mol cl - Cho V lít dung dịch NaOH 1 mol vào dung dịch Y để thu được kết tủa lớn nhất thì giá trị v là

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.