How many valence electron do silver have

Silver has only 1 valence electron.

The electron configuration of Silver gives one outer shell electron, basically a valence electron.

Silver has 1 valence electron. In terms of orbitals, it has the following electron configuration: 4d^10,5s^1. Due to the single electron in the 5s orbital it tends to lose it forming a 1+ ion.

The problem here is that according to aufbau principle before 3d orbital 4s subshell comes.after filling 3p orbital with electrons you have 4 electrons left, you place two in 4s with opposite spin and the other two in 3d in any of its two orbitals of total five orbitals with the same spin.

Ametal with a large number of free flowing electrons most likely has good conductivity