Compounds and Formulae

Flashcards covering compounds, formulae, elements, and related chemical concepts.

Condensed Molecular Formula

A representation of a molecule showing the number and type of atoms present.

Structural Formula

A representation of a molecule showing the arrangement and connectivity of atoms.

Expanded Structural Formula

A detailed representation of a molecule showing all atoms and bonds.

Element

A pure substance that cannot be broken down into simpler substances by chemical reaction and is composed of identical atoms.

Periodic Table

A chart of all known elements organized by their atomic number and properties.

Atomic Bonding

Atoms of elements (except group 8 atoms) are unstable alone and bond with other atoms to become more stable.

Compound

A pure substance which contains two or more elements chemically combined (bonded together).

Inorganic Compound

Compounds that usually are small and have a simple formula: e.g. CO2 H2O NaCl

Organic Compound

Compounds that always contain carbon and are often large and complex (no simple formula). Many are made by living things: e.g. proteins DNA carbohydrates

Compound Definition

A pure substance that contains 2 or more elements chemically combined.