Elements Compounds and Mixtures

What are the general characteristics of a compound?

• A chemical reaction takes place during its formation.

• Its components can be separated by physical processes.

• Its properties are the same as those of its components.

• Its properties are different from those of its components.

What are the general characteristics of a mixture?

• A chemical reaction takes place during its formation.

• Its components can be separated by physical processes.

• Its properties are the same as those of its components.

• Its properties are different from those of its components.

A compound has a ______ ratio of constituent elements.

A mixture has ____ _____ ratio of constituents.

There are only metal elements in an alloy.

• True

• False

Which statements describe the properties of most metals?

• Metals usually have high melting and boiling points.

• Metals are good conductors of electricity and heat.

• Metals are magnetic.

• Metals are malleable and ductile.

Metals are malleable and ductile as they have _______ structures. When a force is applied, the ______ of atoms can ______ over each other easily.

Alloys are harder and stronger than metals because the regular arrangement is _________ because of different atom sizes. It is _________ for the _______ of atoms to slide over each other.

Which diagram represents an alloy?

• A

• B

• C

• D