Which combination of elements below will bond ionically and in the same ratio as lithium when it bonds to sulfur? a) carbon and oxygen b) sodium and oxygen c) calcium and nitrogen d) aluminum and chlorine

we can conclude that the melting point of table salt is above room temperature (it's actually 801 deg c). the melting point of mercury must be below room temperature (- 39 deg c).

"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."