Isotopes and Atoms

^atomic number: number of protons

-atomic mass - atomic number = number of neutrons
 (p+n)           -    (p)                =  (n)

Example:
Isotopes    Mass   Atomic #    #of protons   # of neutrons
C                 14        6                     6                    8
K                 39       19                  19                   20
Na                23       11                 11                    12

Mass spectrometers: is used to determine the abundance and mass of the isotopes of elements

mass spectrom for boron:

Nicole H