Pure Substances and Mixtures Flashcards

Vocabulary flashcards defining pure substances, mixtures, elements, compounds, homogeneous mixtures, heterogeneous mixtures, and specific classified examples from the lecture.

Pure Substance

A form of matter that has a fixed and uniform composition and uniform properties throughout, consisting of only one type of particle and unable to be separated into other substances by physical methods.

Element

A pure substance made of only one kind of atom that cannot be broken down into simpler substances by chemical means.

Compound

A pure substance made of two or more elements chemically combined in a fixed ratio.

Mixture

A combination of two or more substances that are physically combined but not chemically bonded.

Heterogeneous Mixture

A mixture whose components are not uniformly distributed and in which different parts can be seen or distinguished.

Homogeneous Mixture

A mixture that has a uniform composition throughout.

Gold (Au)

An example of an element.

Oxygen ($O_2$)

An example of an element.

Iron (Fe)

An example of an element.

Water ($H_2O$)

An example of a compound.

Carbon Dioxide ($CO_2$)

An example of a compound.

Table Salt (NaCl)

An example of a compound.

Saltwater

An example of a homogeneous mixture.

Air

An example of a homogeneous mixture.

Oil and Water

An example of a heterogeneous mixture.

Salad

An example of a heterogeneous mixture.

Sand and Water

An example of a mixture with different parts that can be seen or distinguished.