Explain how to make 1 liter of a 0.45 M solution of K 2 S O 4 K2SO4 using K 2 S O 4 K2SO4 powder and water.

a:

by the combination of an unlimited number of elements

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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.