A large number of free electrons are present in metals. Why is there ni current in the absence of elctric field across it?

A large number of free electrons are present in metals.Why is there no current in the absence of electric field across it ?

The number density of free electrons in a metal piece is a very large of the order of 10^(+29) m^-3 . Why is there no current in the metal piece in the absence of electric field across it ?

Total number of electrons present in 48g mG^(2+) are :

The number of unpaired electrons in Ni^(2+) is

The number of electrons present in 3d of Cu+ is ........

Calculate the total number of electrons present in 2.3g of ethane.

Calculate the total number of electrons present in 1 mole of methane.