Characteristics of Chemical Reactions

Formed when two or more atoms chemically combine

 A process that leads to the transformation of one set of chemical substances to another

Smallest part of a substance

The substances initially involved in a chemical reaction

The substance that is produced from a chemical reaction

In a chemical process, atoms that make up a substance are regrouped into different _____________________ to form new substances with different properties.

A _____________________ increase or decrease and the production of light are both signs that a chemical reaction may have occurred.

 A _____________________ is a solid substance that forms and separates from a solution and may indicate that a chemical reaction has occurred.

An unexpected change in _____________________ is a sign that a chemical reaction may have occurred.

Substances giving off a smell, or ________________, while being combined is also an indicator of a chemical reaction.