Pure Substances vs. Mixtures Vocabulary

Vocabulary flashcards covering key definitions and concepts about matter, pure substances, elements, compounds, and mixtures from the lecture transcript.

Matter

Anything that has mass and takes up space (volume).

Pure Substance

A classification of matter with a fixed composition and distinct properties that cannot be separated into simpler substances by physical methods.

Element

A substance that is made from one kind of atom only and cannot be broken down into simpler substances.

Compound

A substance made from more than one element that can be broken down through chemical change.

Mixture

A combination formed when elements and/or compounds are combined physically, having a variable composition and separable by physical methods.

Homogeneous Mixture

Also called a solution, a mixture that has a uniform distribution with the solute evenly spread throughout the solvent.

Heterogeneous Mixture

A mixture that does not have a uniform distribution and whose parts are often visible.

Solute

The substance that enters a solution system and is dissolved evenly in the solvent.

Solvent

The substance in a solution that dissolves the solute.