What is the molarity of a solution composed of 8.210 g of potassium chromate, K, Cro (molar mass = 194.20 g/mol), dissolved in enough water to make 0.500 L of solution?

it's all four options.

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.