How you measure how much?
You can measure mass,
or you can count pieces.
We measure mass in grams.
We measure volume in liters.
We count pieces in MOLES
Defined as the number of carbon atoms in exac
! Describes a reaction
! Must be balanced to follow the
Law of Conservation of Mass
! Can only be balanced by changing
! Has special symbols to indicate state, and if catalyst
or energy is requir
IONIC COMPOUNDS AND METAL
Keeping Track of Electrons
! The electrons responsible for the chemical properties
of atoms are those in the outer energy level.
! Valence electrons - The s and p electrons in the outer
! Core electrons -t