Why are metals generally good conductors of electricity? 1. metals have more protons. 2. metals have strong bonding with other atoms. 3. metals have free electrons in their outer shell?

metal   have   free electrons  in  their   outer  shell  which  make  them  generally  good  conductors  of  electricity. Example  is  the  copper  which   is  used  for  electrical  wiring   since  is  a good  conductor  of  electricity.  copper  with   electronic configuration  of  (Ar)4s2 has  two  free  electrons  in  their  outer  most shell which  allow  it  to  conduct  electricity.

What? i don’t understand