Ch.12: Solids and Modern Materials_I

Front

What type of solid is characterized by particles held together by covalent bonds?

Back

Covalent network solid.

Front

What is a metallic material composed of two or more elements called?

Back

Alloy.

Front

Which type of polymerization does NOT involve the elimination of a byproduct molecule?

Back

Addition polymerization.

Front

How do crystalline solids differ from amorphous solids?

Back

Crystalline solids have a long-range repeating pattern of atoms, molecules, or ions.

Front

What are SiO2 (quartz) and diamonds classified as, and what is notable about their boiling/melting points?

Back

They are covalent network solids, which have very high boiling/melting points.

Front

Define a covalent network solid and give an example.

Back

A covalent network solid is a type of solid where atoms are bonded by covalent bonds in a continuous network. Example: Diamond.

Front

What is the significance of the long-range order in crystalline solids?

Back

The long-range order in crystalline solids contributes to their distinct geometric shapes and predictable physical properties.

Front

What is the difference between an alloy and a pure metal?

Back

An alloy is a mixture of two or more elements, at least one of which is a metal, while a pure metal consists of only one type of atom.

Front

What is the process of addition polymerization?

Back

Addition polymerization is a reaction where monomers add together without the loss of any byproduct, forming a polymer.

Front

What are the properties of covalent network solids that contribute to their high melting points?

Back

The strong covalent bonds throughout the structure require a large amount of energy to break, resulting in high melting points.