science review! Flashcards
what is a valence electron?
the electron(s) found in the outermost energy level
of an atom
what is ‘the shorthand notation that scientists use to
describe a chemical reaction’
chemical equation
what is a coefficient?
the number placed in front of a reactant or product
in a balanced chemical equation
what is ‘a compound formed when two or more atoms
share electrons to achieve a stable octet’
binary covalent compound
what is a chemical reaction?
a process in which new substances with new
properties are created
what is ‘a pure substance that undergoes a chemical
change’
reactant
what is an anion?
a negatively charged particle
what is ‘a neutral particle composed of two or more atoms joined by covalent bonds’
a product
what is a covalent compound
a compound composed of two non-metals joined
by one or more covalent bonds
what is an ion?
a charged particle
what is ‘a pure substance that is formed from a chemical change’
a molecule
what is a cation?
a positively charged particle
what is ‘an ion composed of more than one atom’
a polyatomic ion
what is a binary ionic compound
a compound formed from a metal cation and
a non-metal anion
what is an ionic compound?
a compound composed of oppositely charged ions
