The Structure of the Atom

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Presentation transcript:

The Structure of the Atom Bohr, Energy Levels and Elementary Particles

Review In your groups, review from last class: what are the 3 subatomic particles we’ve learned about? what subatomic particle determines the identity of the element? what subatomic particle has a positive charge? what subatomic particle has a negative charge? what subatomic particle has a neutral charge? how do you determine the mass of an atom?

Topics for Today Bohr and orbitals atomic number and atomic mass Strong nuclear force (and mesons) Elementary particles quarks gluons leptons mesons

Bohr Atomic Model of an Atom electron orbitals or “energy levels” electron proton neutron electrons can jump from one energy level to another but cannot exist in between

Let’s Compare Models… On a whiteboard, draw a Venn diagram of the similarities & differences between the Rutherford Model & Bohr Model Rutherford Bohr Both

Protons Neutrons Electrons

(one quark and one “anti-quark”)

Protons and Neutrons are made of “Up” and “Down” Quarks

Proton Neutron Each Quark has a “partial charge” that is either + or – “Up” quarks have a charge of +2/3 “Down” quarks have a charge of -1/3

Proton +2/3 -1/3 = + 1 Neutron +2/3 -1/3 = 0

Mesons Quarks Gluons Leptons