Explain why magnesium can conduct electricity but polyethene can not​

Plastics like Polyethylene ,Polystyrene do not conduct electricity. However , if the polymer is polar , it has a dipole moment which can cause it to be conductive . ... There are also highly conducting polymers like Polyanilines and polyacetylenes due to their structure which permits easy shifting of electrons.

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.