When 10.0 g of NH3 reacts, the actual yield of N2 is 8.50 g. What is the percent yield? NH3(g) + NO(g) → N2(g) + H2O(l)

they are all solids.

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.