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Day 8: Mass Number & Proton/Neutron
Calculation then Research Time for the Atomic Theory Presentation:
-Quiz on Proton/Electron/Charge
-Identify significant contributors to the mass of the atom
-Identify atomic number (Z), mass number (A), and their arrangement
around the chemical symbol
-Enforce the idea that protons are very stable
-Assign "Proton/Neutron Calculations"
-Library time to work on Atomic Theory Presentation |
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Proton/Neutron Calculations
Quiz the students on
what they recall from day 6. "What parts of an atom do not significantly
contribute to an atom's mass? Which parts do significantly contribute to
the atoms mass?" Point out that neutrons and protons are vary similar in
mass. Introduce the concept of the mass number and enforce the idea that
the number of protons do not change and can be determined by the
identity of the element and vice versa. Draw an atomic symbol on the
board with its atomic number and mass number attached. Have students
help you determine how these numbers have been determined.
Hand out the assignment. Students should add the proper
terminology to the assignment sheet's given example. The students have
10-15min to get a start on the assignment.
Library/Internet Research
As students near
completion of the assignment, they may be released to the library to
continue researching their Atomic Theory Contributor |
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