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Atomic Theory (Atoms ( made of subatomic particles) (Nucleus (Protons,…
Atomic Theory
Atoms ( made of subatomic particles)
Electrons
Nucleus
Protons
Electrons
Nucleons:
Isotopes
Same # of Protons different # of Electrons
Atomic Number
of protons
History
JJ Tompson
Cathode Ray Tube
http://openstaxcollege.org/l/16JJThomson
Robert Millikan
Oil Drop Experiment
Ernest Rutherford
Gold Foil Experiment
http://openstaxcollege.org/l/16PhetScatter
1.4
Isotopes
Have the same number of protons and a different number of neutrons
Atomic Number
Number of protons
Atomic Mass
Number of proton and neutrons in the nucleus
weighted average of all mass numbers
basic unit of mass for chemists