Es para completar un crucigrama besties PISTAS:
1- MANERA DE COMBINAR LOS ATOMOS PARA FORMAR MOLECULAS.
2- PARTICULAS DEL ATOMO QUE POSEEN MASA, PERO NO CARGA.
3- EXCEPCIÓN DE LA REGLA DEL OCTETO.
4- ELEMENTOS QUE MAS ABUNDAN EN LA TABLA PERIODICA.
5- UNION EN LA QUE UN ATOMO LE DA ELECTRONES A OTRO.
6- REGLA QUE SE BASA EN QUE LOS ATOMOS SE ESTABILIZAN COMPARTIENDO O
CEDIENDO ELECTRONES.
7- PARTICULA PEQUEÑA, QUE CONSTA DE DOS ZONAS

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.

i belive it is water