Alloy metals are classified as homogeneous mixtures because o a single alloy sample looks different throughout
o they are pure substances
o they consist of only one kind of atom
o they have the same appearance throughout

a

Explanation:

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.