Relation between Resonant frequency and Resistance in series RLC circuit
What effect will it have on my resonant frequency


Theoretically it will have no effect on the resonant frequency. The resonant frequency is purely determined by the capacitor having exactly the opposite reactance of the inductor at a particular frequency and the two reactances cancel leaving the series tuned circuit having only resistance at resonance.

However, with lower values of resistance the peak shape of the resonance will change but the centre point of the peak will remain as previous.