The normal freezing point of a certain liquid is , but when of potassium bromide () are dissolved in of the solution freezes at instead. Use this information to calculate the molal freezing point depression constant of . Round your answer to significant digits.

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.