Fridat, october 2nd, 2009

Today at the beginning Mr. Ariel said that he wasn't going to ask who found the homework hard, because apparently most of us had sent him e-mails asking for help, and he wet on to explain how it should've been done. When he drew it, one of the students realized that he had forgotten to tell us something when it comes to drawing the electrons in their shell. We thought that we were just adding the next drawing of the levels when really we were supposed to have 2 "s" levels and then the first "p" leve, when most of us thought that we only draw the s level once and then the p and so on, so he made it clcear that we're suppossed to draw the "s" level once again as we get to a new level. Also he gave us a hand out that tells us the order of the electron configuration and said that that would help us understand how to place the electrons. It looked something like this, with arrows telling you to go diagonally down from right to left:

1s
2s 2p
3s 3p
4s 4p 4d
5s 5p 5d
6s 6p 6d 6f
7s 7p 7d 7f
Also it had a picture of Bohr's model of the atom and it had how many electrons could fit in each of the levels and the order of them. And he explained it as if it was a concert stadium with all the seats beong the same price. First you fill the front row tickest which aare 1s and 2s then you move on to the ones that get farther and farther away. We did a buch of execercises with them and the first 5 to finish one of them would get an extra point in the test. One of the questions was the electron configuration of Gold (79) which was:

1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d⁹

And he left Platinum's electron configuration for homework.

Victoria Bracamontes