which of the following statements are correct with regard to lewis bonding theory and valence bonding theory?
a. Valence bond theory predicts a different number of valence electrons around a central atom than Lewis theory does.
b. Valence bond theory can make predictions about bond angles that Lewis theory cannot.
c. Lewis theory does not explain differences in bond strength, while valence bond theory does.
d. Lewis bond theory explains why bonds form, while valence bond theory does not.