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Chapter 5 Vocabulary

Physical Science Chapter 5
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Compound
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
Molecule
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
Metals
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
Malleability
the ability of a material to be hammered or rolled into sheets
Ductility
the ability of a substance to be pulled into wires
Crystal
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
Polymer
is a covalent compound made up of many small, repeating units linked together in a chain
Monomer
a small molecule that forms a link in a polymer chain
Valence
the number of electrons in
its outermost energy level

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