Wednesday, September 21, 2011

HW#6c -- Wednesday, Sept. 21

For HW on this day, finish problems #1-6 on the 'Bohr model' worksheet that we started on today in class. You are welcome to try the last two or three, marked with stars, for bonus credit. Remember, there are three rules:

1) Fill in the energy levels closest to the nucleus first
2) Do not move up to the next energy level until you've filled the one before it (1st ring fills with two electrons, 2nd ring fills with eight, 3rd ring fills with eight, etc.)
3) Only use exactly as many electrons as you have. For example, Boron's atomic number is 5, meaning that it will have five protons and, being neutral, it will have exactly five electrons.

You may find this online periodic table (click here) helpful for completing this exercise, and it might also help you finish coloring, labelling and writing two facts about each of the families on your periodic table.