atomic number (z)
of protons (what makes an element unique)
mass number (A)
of protons and # of neutrons
set up for nuclide symbol/notation
A q (q=relative charge)
X
z
how to find neutron amount
mass number minus atomic number
isotopes
have the same atomic number but different mass number
atomic mass units
a.m.u is the average mass listed in the periodic table
how to find most common isotopes
look for closest integer value to the average mass
ions
charged atoms
positive charged ion is
cation
negative charged ion is
anion