What exactly is a concentration of acceptor in p-type semiconductor

[MissP.25_5]

What exactly is a concentration of acceptor in p-type semiconductor? The symbol is Na.
Lets say there's a Silicone, and it has 3 valence electrons, when it receives electrons (releases hole), it becomes negatively ionized, right? So that should mean Silicone is an acceptor, right? But what is concentration of acceptor?

 

[Simon Bridge]

Na = sodium. You'd normally use boron (B) or gallium (Ga) to make silicone (Si) p-type.

The concentration of acceptor sites depends on the doping.
http://electronics.howstuffworks.com/diode1.htm

 

[MissP.25_5]

Na = sodium. You'd normally use boron (B) or gallium (Ga) to make silicone (Si) p-type.

The concentration of acceptor sites depends on the doping.
http://electronics.howstuffworks.com/diode1.htm

No, you misuunderstood me. I didn't mean Na as "Natrium" but just a symbol for concentration of acceptor in p-type semiconductor. It's actually N_a.

 

[Simon Bridge]

OK, but the answer still stands.