Chemistry
Vocabulary
Part 3
Meghan Goodell
Chemical Equation
 Shorthand form, used for writing what
reactants are used and what products
are formed in a chemical reaction
Subscript
 The term written beneath an element
that indicates the number of atoms of
this element or compound.
Chemical Formula
 A way of expressing information about the number of
atoms that make up particular chemical compounds.
Chemical Bond
 An electrical force linking atoms
ion
 an atom or molecule in which the total number of
electrons is not equal to the total number of protons,
giving the atom a net positive or negative electrical
charge.
Cation
 a positively charged ion
Anion
 Negatively charged
ion
Metallic bond
 Bond formed when metal atoms share their pooled
electrons
Ionic bond
 Attraction that holds oppositely charged ions close
together
Covalent bond
 Chemical bond formed when atoms share electrons
Octet Rule
Atoms with 8 electrons on their outer energy level (shell)
are stable (unreactive)
Valence Electrons
 An electron in an outer shell(energy level) of an
atom that can participate in forming chemical
bonds with other atoms.