tempchem Flashcards
ionic compound
metal + nonmetal; or cation + anion
molecular compound
nonmetal + nonmetal; no charge, uses latin prefixes
subscripts
show number of atoms present
polyatomic ions
ions with more than one element
order of decreasing oxygens in polyatomic ion
per__ate, __ate, __ite, hypo__ite
to figure out each separate charge in the ionic compound
use algebra (charges should be neutral) and the periodic table
how to determine charge from periodic table
think of number of electrons needed to be added/removed to have the same number of electrons as the nearest noble gas; this makes it stable
transition metals
some have multiple charges; use roman numerals to represent each charge when writing the name.ex. Iron (II) oxide -> Iron has +2 charge, not +3 charge
total charge on compound
must be neutral; use crossover method
crossover method
take the number from the anion and make it the subscript of the cation, and vice versa
how to name molecular compound
(use prefix if more than one atom)+1st element + prefix+root+ide
if root starts with vowel
drop “o” or “a” of prefix
1
mono-
2
di-
3
tri-
