Four satellites are in orbit around the Earth. The heights of their four orbits are identical. The masses of the four satellites are given in the table. For which satellite is the gravitational pull of the Earth the strongest? Satellite A - 800 kg
Satellite B - 500 kg
Satellite C - 600 kg
Satellite D - 700 kg

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.