which statement describes the difference between a metallic bond and a hydrogen bond?

Question

a. a metallic bond forms between positive ions and freely moving electrons surrounding them, while a hydrogen bond forms when two polar molecules are attracted to each other

b. a metallic bond forms when two polar molecules are attracted to each other, while a hydrogen bond forms between positive ions and freely moving electrons surrounding them

c. a metallic bond forms when two nonpolar molecules are attached to each other, while a hydrogen bond forms between two atoms that can share a pair of valence electrons

d. a metallic bond forms between positive ions and freely moving electrons surrounding them, while a hydrogen bond forms when two atoms share valence electrons

Answer 1

A metallic bond is between positive ions with electrons moving freely surrounding them.

(It is called that way because the free electrons is what causes conductivity.)

A hydrogen bond is a type of valance bond resulting in a polar molecule.

(A typical example is water, where two hydrogen atoms share their electrons with an oxygen atom, but the electrons are pulled closer to the oxygen resulting in electrical polarity.)

a. describes correctly a metallic bond, but not hydrogen bond.

What is attributed to hydrogen bond is actually attraction between polar molecules.

(For example, this is what causes water molecules to stick to each other.)

b. is wrong in both statements.

Its description of metallic bond is like the property of water I mentioned in a.

Is description of hydrogen bond is actually a metallic bond.

c. describes a hydrogen bond correctly, but metallic bond is between atoms, not molecules.

d. is correct. However, in my understanding a hydrogen bond is a special type of valence bond (see at the top).