7.3 Bonding in Metals

The valence electrons of atoms in a pure metal can be modeled as a sea of .................

• electrons

• protons

• neutrons

.................................. are the forces of attraction between the free-floating valence electrons and the positively charged metal ions.

• Metallic bonds

• ionic bonds

• molecular bonds

Metals are good conductors of electric current because electrons can flow freely in the metal.

• True

• False

............................ means that they can be hammered or pressed into shapes.

• Malleable

• Ductile

............................ means that they can be drawn into wires

• Malleable

• Ductile

.................... are mixtures of two or more elements, at least one of which is a metal.

• Molecules

• Alloys

• Covalent compound

Alloys are important because their properties are often superior to those of their component elements.

• True

• False

Crystalline Structure of chromium is..............

• body centered cubic

• faced centered cubic

• hexagonal close packed

Crystalline Structure of gold is..............

• body centered cubic

• faced centered cubic

• hexagonal close packed

Crystalline Structure of zinc is..............

• body centered cubic

• faced centered cubic

• hexagonal close packed