Chemistry Chapter 1 Vocabulary

Chemical

Any Substance that has a definite composition.

Chemical Reaction

Necessary for living things to grow and dead things to decay.

States of Matter

Solid,liquid,or gas

Reactant

A substance or molecule that participates in a chemical reaction.

Product

A substance that forms in a chemical reaction.

Volume

A measure of the size of a body or region in three dimensional space.

Matter

Anything that has mass and takes up space

Mass

The measure of the amount of matter in an object.

Weight

A measure of the gravitational force exerted on an object.

Quantity

Something that has magnitude,size,or amount.

Unit

A quantity adopted as a standard of measurement.

Conversation Factor

A unit that is derived from the equality of 2 different units and that can be used to convert from one unit to the other.

Physical property

A characteristic of a substance that does not involve a chemical change.

Density

The ratio of the mass of a substance to the volume of the substance.

Chemical Property

A property of matter that describes a substances ability to participate in chemical reactions.

Atom

The smallest unit of an element that maintains the properties of that element.

Pure Substance

A sample of matter, either a single element or a single compound, that has definite chemical and physical properties.

Element

A substance that cannot be separated or broken down into simpler substances by chemical means.

Molecule

The smallest unit of a substance that keeps all of the physical and chemical properties of that substance.

Compound

A substance made of 2 or morendifferent elements joined by chemical bonds.

Mixture

A combination of 2 or more substances that are not chemically combined.

Homogeneous

Describes something that has a uniform structure or composition throughout.

Heterogeneous

Composed of dissimilar components.