Class notes picked up on slide show 2.1 "The Nuclear Atom" from slide
10 upon which students were asked to complete the following table.
Throughout the slide show concepts such as
isotopes, the workings of a mass spectrometer (device used to define the mass
of atoms and compounds) were described. On slides 13 & 14 students were
asked to answer the following question with the data provided below, "what
is the RAM* of zirconium?"
*RAM - Relative atomic mass.
The question is answered by multiplying the "relative
percentage of abundance" by the number of protons in the corresponding
isotope. Once this has been done for all of the isotopes they may be added and
then divided by 100 to find the RAM e.g.
((90*51.5)+(91*11.2)+(92*17.1)+(94*17.4)+(96*2.8))/100 = 91.318
The class then partook in a demonstration of how the RAM of an
element is found in order to calculate the mass of different isotopes. This
demonstration used coins in opaque containers. When the mass of the different
coins is provided the following equation** could be used to calculate how many
of each coin was in each canister.
**Hint: Let y = the number of 5p coins. Then let 10-y = the
number of 1p coins.
Equation: Total Mass = [(y)*(mass
of 5p coins)] + [(10-y)*(mass of 1p coins)]
Students were then asked to compose eight different atoms on the
iPad app "Atomic Elements Carolina"
Homework:
"IB1 Chemistry Atomic Theory Study Guide Part 1"
&
"IB Honors Chemistry Atomic Theory Study Guide Part 1"
Questions: 1-7 & 10, 11, 12, 14, 15, and 16.
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