Chapter 5 Science Vocab

Compound

pure substance that contains two or more elements

Chemical Formula

a shorthand expression that uses atomic symbols and subscripts to show the elements and the number of atoms of each element that combine to make a compound

Chemical Bond

force that holds atoms together in a compound

covalent bond

a chemical bond that forms when atoms share electrons

Binary Compound

ionic compound with only two different ions

Molecule

a neutral particle that forms as a result of electron sharing

crystal

a regular, repeating arrangements of atoms, ions, or molecules

ionic bond

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

valence

Electrons on the outermost energy level of an atom

monomer

a small molecule that forms a link in a polymer chain

metal

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

metallic bond

a bond formed when many metal atoms share their pooled valence electrons

Malleability

the ability of a substance to be hammered or beaten into thin sheets

Ductility

the ability of a substance to be drawn, pulled, or extruded through a small opening to produce a wire

unit cell

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

Polymer

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