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Physical Science Chapter 5


a pure substance that contains two or more elements

Chemical Formula

contains atomic symbols and subscripts
to show the elements and the number
of atoms of each element that combine
to form a compound


a neutral particle that forms as
a result from electron sharing

Chemical Bond

a force that holds atoms together in a compound

Ionic Bond

is an electrical attraction between positively and negatively charged ions in an ionic compound

Covalent Bond

a chemical bond formed
when atoms share electrons


elements that are usually shiny, good conductors of heat and electricity,
and solid at room temperature

Metallic Bond

a bond formed when many metal
atoms share their pooled electrons


the ability of a material to be hammered or rolled into sheets


the ability of a substance to be pulled into wires


is a regular reapeating arrangement of atoms, ions, or molecules

Unit Cell

is the smallest repeating pattern that
shows how the atoms, ions, or
molecules are arranged in a crystal


is a covalent compound made up of many small, repeating units linked together in a chain


a small molecule that forms a link in a polymer chain


the number of electrons in
its outermost energy level

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