Basic Concepts (HSC SSCE Chemistry): Flashcards

Contains only one type of material, constant properties

Uniform composition throughout

Cannot be decomposed into simpler substances by chemical means

Elements always present in same fixed ratio by mass

Direct change from solid to gas without liquid phase

Homogeneous mixture with extremely small dispersed particles

Change where no new substances form

Change where at least one new substance forms

Smallest particle of an element retaining its identity

Smallest particle of a substance capable of separate existence