No, the Lewis structure for RnCl4 will not have 2 lone pairs on the central atom. Radon (Rn) is a noble gas and prefers to have a full octet of electrons, so it will not typically have any lone pairs. In the case of RnCl4, radon will form 4 covalent bonds with chlorine atoms, giving it a total of 8 valence electrons around the central atom. Each chlorine atom will have 3 lone pairs and 1 bond with radon.
