Isotopes & Atoms

Atomic number : Number of Protons
Atomic mass - atomic number = # of neutrons
Isotopes - same atomic number but different mass
ex 3 types of hydrogen atoms
1H 2H 3H
(1p)(1p,1n)(1p,2n)
not all atoms of same element are identical

ex
Isotope | Mass # | Atomic # | # of Protons | # of Neutrons
54Fe | 54 | 26 | 26 | 28
66Mn | 56 | 25 | 25 | 31
237Np | 237 | 93 | 93 | 144
14C | 14 | 6 | 6 | 8

Mass Spectrometers
- used to determine the relative abundance and mass of isotopes of elements

(mass spectrometer and how it works)

- JanCarlo Paysan