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Isotopes and Atoms
Tuesday, October 26, 2010 /8:10 PM

 Isotopes and Atoms


Atomic Number - the number of protons

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

Isotopes - have the same atomic number but different mass

Example:

Isotope
Mass Number
Atomic Number
Number of Protons
Number of Neutrons
88 Sr
88
38
38
50
16 O
16
8
8
8
89 Y
89
39
39
50

Mass Spectrometers:
-are used to determine the abundance and mass of hte isotopes of elements
-device known as a mass spectrometer can be used to determine the relative abundance and the mass of the isotopes of elements

~christina chow :]