Question

Which combination of factors is most suitable for increasing the electrical conductivity of metals?
A.more valence electrons and larger atomic radius

B.fewer valence electrons and larger atomic radius

C.more valence electrons and smaller atomic radius

D.fewer valence electrons and smaller atomic radius

Answer 1

lets first define what are valence electrons and what is atomic radius, shall we?
then we can talk about changes those two have on electrical conductivity.

Answer 2

a- more valence electrons and larger atomic radius