20amp breaker how many socket in give me

I am assuming you are asking how many outlets you can put on a 20AMP circuit. No specific answer can be given because we don't know what you plan to plug in them. You could have 2 X 100Watt lightbulbs and a 1600 Watt griddle and be very close to an overload. What are your plans, where are these circuits going to be used? Kitchen, basement, bath, garage? How long will the wire be? What AWG wire are you using?