8,8-dichloro-7,7-diethyl-4- fluoro - 3,3-dihydroxy-6, 6-
dimethyl-2-phenyl dec-4-en
-9-gnoic acid

c (diamond),

sio2 (quartz)

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.