Describe the difference between density and volume

hey there

Density;

The amount of mass or particles per unit of space.

for example, the density of water is 997 kg/m³

Volume;

the amount of space something takes up.

For example Mars is 163 billion cubic kilometers^3

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.