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Concepts Chapter 4 - The Atom (The Atom Scientists (J. J. Thomson, Robert…
Concepts Chapter 4 - The Atom
The Atom Scientists
J. J. Thomson
Robert Millikan
John Dalton
Ernest Rutherford
Democritus
James Chadwick
Parts of the Atom
Nucleus
Protons
Atomic Number is number of protons in the nucleus.
positive particle (p+)
Very big
Neutrons
Very big
neutral (n0)
Atom Math
MN= # of Protons + # of Neutron
Protons = MN - Neutrons
Neutrons = MN - Protons
Electron Cloud
Electrons
negative (e-)
Very Small
Mass Number
MN= # of Protons + # of Neutrons
Average Atomic Mass rounded to the nearest whole number.