Question

the third type of chemical bonding, metallic bonding, occurs between metal atoms. this type of bonding is quite different from ionic and covalent bonding. in metallic bonding, electrons are shared between metal atoms because the electronegativity difference between the atoms is relatively small. this sounds similar to covalent bonding, but covalent bonds form when electrons are shared between just two nonmetal atoms. in metallic bonding, electrons are collectively shared among all of the atoms in the material. in sodium (na) metal, the positively charged nuclei of na atoms are arranged in an orderly lattice. the valence electrons of the na atoms move freely throughout the entire lattice. these freely moving electrons are often called a sea of electrons. select all the true statements. in metallic bonding, a pair of electrons is shared between only two metal atoms. valence electrons move freely throughout a metal. metallic bonding occurs between metal atoms. in metallic bonding, electrons are transferred from one atom to another atom.

Explanation:

• In metallic bonding, electrons are collectively shared among all atoms, not just between two, so the statement about a pair of electrons shared between only two metal atoms is false.
• The text clearly states that valence - electrons move freely throughout the metal lattice.
• Metallic bonding occurs between metal atoms as described in the initial statement of the text.
• In metallic bonding, electrons are shared (collectively) not transferred from one atom to another like in ionic bonding.

Answer:

• Valence electrons move freely throughout a metal.
• Metallic bonding occurs between metal atoms.