Atomic Structure building exercise-Gizmos Software Module “Element
Builder”
Build the following (refer to the periodic chart if you need to):
Yard Dogs
1)
An alpha particle is a helium nucleus. Build it. Look at the charge.
Explain why it was deflected in Rutherford’s gold foil experiment.
2)
Build Magnesium-24 ion with a 2+ charge
3)
Build Carbon-13. How does it differ from carbon-12?
Big Dogs
1)
Build boron-11
2)
Build boron-11 with a 3+ charge
3)
How many protons, neutrons and electrons do I need to add to
boron-11 to make neutral C-14?
Little Dogs
1) Build sulfur-32, sulfur-33, and sulfur-34. Gizmos provides the %
abundance number for each. Write those values down.
2) Go to the board and calculate the average atomic mass of sulfur.
3) Watch the electron motion in the atom(s). Explain what you see.
Spotted Dogs
1) Build the oxygen-16 ion with a 2- charge. For what reason does it
have a 2- charge on it?
2) Make this oxygen atom neutral. Then, make an isotope of oxygen from
it.
3) Make the neutral fluorine-19 atom from the oxygen atom. What subatomic particle MUST be added to change your oxygen model to a
fluorine model? Which one must be removed to make a neutral atom?
Which one must be added to give a mass number of 19?
Fluffy
1) Hydrogen exists as three isotopes: protium, deuterium, and tritium.
Build them. When adding neutrons to your models, does the charge on
the atom change? Explain.
2) If you add 1 proton to your tritium model, what atom results? Is it
charged? Build it.
3) How many electrons are required to make the atom (in 2 above)
neutral?
Dr. Poche, DHS