Practice 3: Match the information below with the correct type of crust. Continental Crust
Oceanic Crust
A Basalt Rock
B. Granite Rock
C. 35-75 km
D. 5-10 km

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.