Chemistry 10 Exam#1

Molecular composition of the substance remains intact, despite a change in state. No change in the amount and type of particles present.

Molecules in substance are changed into different substances. Fundamental components of the substance change, also called a reaction.

A type of matter that cannot be broken down into other substances by chemical methods.

Only contains one type of atom (eg. iron contains iron atoms

A substance composed of a given combination of elements that can be broken down into these elements by chemical methods.

Must contain atoms of at least two or more elements. (e.g. H2O)

Two or more substances that results in variable composition

Seperation of a mixture. (e.g. by changes in SOM which seperrates two substances).

A measure of heat energy content.

Reflectivity of light relates to the distance between the particles which varies depending on the specific state of matter. For instance, gases do not have a fixed volume and cannot reflect light. We can never see gases.

Energy is neither created or destroyed, during physical or chemical changes.

Matter is neither created or destroyed, during physical or chemical changes.

Properties that are dependent on the physical quantity present. (e.g. mass, volume). Usually physical quantitative types of properties.

Properties that are Independent of the physical quantity present.(e.g. density, color, combustion) usually chemical type of properties.

The process of heat or thermal energy entering a system.

The process of heat or thermal energy exiting a system.

SOM Changes, Melting point, dissolving, Volume, Mass, Density, Odor, solubility.