Chemical bonds are not the same as phases. Metallic bonds are a type of covalent bond. Gases, liquids and solids are phases of matter. read more
Covalent bond formed due to sharing,pairing etc.these bonds has a chance to loss electron die to weak forces between the atoms.so,they can't exist as solid. Hence covalent bond exists as liquid and gases. read more
Metals are all solids (except mercury) and have relatively high melting points because the metal atoms are linked by strong metallic bonds. Metals conduct heat and electricity in the solid and liquid state because the negatively charged valence electrons are free to move. read more