Is the fact that a combination reaction occures between sodium and chlorine applicapable to the argument sodium and chlorine combine to form table salt?
Yes, because the product of the combination (aka synthesis) reaction between sodium and chlorine is the compound sodium chloride (NaCl), which is common table salt.
This reaction is called a "single displacement" reaction, as the sodium replaces the potassium in combination with the chlorine. *This is the high-temperature distillation reaction to produce metallic potassium, and is not a spontaneous reaction because potassium is more reactive than sodium. The corresponding single replacement reaction is K + NaCl => Na + KCl.