Classification of Matter and The Atomic Theory

A set of vocabulary flashcards covering the classification of matter based on composition, structural units, and the foundational laws of atomic theory.

Pure substance

A sample of matter that is made of identical particles.

Mixture

A sample of matter made up of different particles, or elements and combines that share a room but keep their identity by not chemically reacting with each other.

Particles

A general name for any structural units of a substance, such as atoms, isotopes, eons, and molecules.

Substance

A general name for any sample of matter, such as an element, a compound, or a mixture.

Element

A sample of matter that is made up of identical atoms.

Atomic elements

Elements that can exist as individual, separate, stable atoms, of which atoms are the structural units.

Molecular elements

Elements consisting of groups of identical atoms connected by bonds, in which molecules are structural units.

Compound

A substance made up of elements connected by chemical bonds.

Ionic compound

A compound existing as eons kept together by opposition charge attraction.

Law of conservation of mass

One of the foundational laws that led to the formulation of the atomic theory.

Law of definite proportions of constant composition

One of the foundational laws that led to the development of the atomic theory.

Dalton's atomic theory

A theory of matter formulated based on foundational chemical laws, including the law of conservation of mass and the law of definite proportions of constant composition.