A total of 0.50L of O2 is collected at a pressure 300 mm hg. What volume will this gas occupy at sea level(760 mm Hg) at constant temperature & mass. (Boyle's Law)

b.false that your answer

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.