. Los elementos del 58 al 71 conforman la serie de los y a qué periodo pertenecen . Los elementos del 90 al 110 conforman la serie de los y pertenecen a periodo:

i believe it is c.) 1575 j.

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

if it's not useful, feel free to report for mistake in answer.