Metallic Bonding and Alloys

Vocabulary flashcards reviewing metallic bonding, properties of metals, and alloys based on the lecture transcript.

Metallic bonding

The type of bonding between metal atoms, held together in a regular structure by strong electrostatic attraction between positive ions and negative delocalised electrons.

Ionic bonding

The type of bonding that occurs between metals and nonmetals.

Covalent bonding

The type of bonding that occurs between nonmetals and other nonmetals.

Delocalised electrons

Outer shell electrons given up and shared by metal atoms that are free to move about, carrying electrical current and thermal energy.

Malleable

The property of pure metals that allows them to be easily bent or hammered into shapes because their regular structure permits different layers to slide over one another.

Alloys

Harder materials containing two or more different elements, made by mixing different metals or a metal and a non-metal with different sized atoms so the layers can no longer slide over one another.

Steel

An alloy made up mostly of iron that contains $1-2\%$ carbon, and sometimes chromium, manganese, or vanadium, providing the strength required for use in cars and planes.