text: in the compound kclo3 the total negative valence is?   i agree with the first answer if this is a trick question.  otherwise, the only negative valence in this molecule is that of chlorine which, in this case is -7 (this is the answer i would give).  each oxygen has a +2 in this case and supplies a total +6 valence with the potassium, always a +1 bringing the total charge to zero. good luck with this one.