Chemistry Unit 1 Flashcards

Front

Pure substance

Back

A material with a constant composition and specific properties.

Front

Elements

Back

Substances that cannot be broken down into simpler substances by chemical means.

Front

Physical properties

Back

Observable or measurable properties that do not change the substance's composition.

Front

Chemical properties

Back

Characteristics that describe a substance’s ability to change into a different substance.

Front

Density

Back

The amount of mass per unit volume of a substance.

Front

Atoms

Back

The smallest unit of an element that retains the chemical identity of that element.

Front

Subatomic particles

Back

Particles that make up an atom (protons, neutrons, and electrons).

Front

Protons

Back

Positively charged particles found in an atom’s nucleus.

Front

Neutrons

Back

Particles with no charge, found in the atom’s nucleus.

Front

Electrons

Back

Negatively charged particles orbiting the nucleus in the electron cloud.