Which should be larger in size, the ion c4+ or the ion Si4+? Why?

"hydrogen bonding is the attraction of h atoms in the water molecule (slight + charge) to o atoms in a neighboring water molecule (slight - charge); it is a weak interatomic force. but it is still strong enough to the water molecules "stick" together."

i think it's c. if you look search electronic symbol on google and then click on wiki it shows you a