friday, march 19,2010

Today, all we just did was corrected all the assigned homework from ms. K.
If you flip over your notes, you'll see or should see a worksheet titled "Patterns in Electron Configuration"and also "Calculating Numbers of Electrons and Predicting Ionic Change".
And so here are the correct answers:

Patterns in Electron Configuration:
1. 1A, 2A
2. 3A, 4A, 5A, 6A, 7A and 8A
3. 1B -> 10B
4. Inner transition metals
5. period #= energy level of valence of electrons
6. period #3= 3rd energy level
7. period #4= energy level is 3 for d's
8. period #6= f orbitals is 4
period #7= f orbitals is 5
9. group number = # of valence electrons
e.i. group II a has 2 valence electron

Calculating #'s of Electrons and Predicting Ionic Change:
1. Na -> Na^+ 1e-
more positive charges than negative charges
2. 2e- + O -> O^2-
has two more electrons than protons
3. protons + electrons = ion charge
example: 5pt + 6 e- = -1
4.a. Beryllium (Be) = 1s^2, 2s^2
(Be^2+)= 1s^2
b. Flourine (F) = 1s^2, 2s^2, 2p^5
(F-) = 1s^2, 2s^2, 2p^6
c. Argon (Ar) = 1s^2, 2s^2, 2p^6, 3s^2, 3p^6
(doesn't bond as it has a stable bond)
d. Sulfur (S) = 1s^2, 2s^2, 2p^6, 3s^2,3p^4
(S^2-) = 1s^2, 2s^2, 2p^6, 3s^2, 3p^6
e. Sodium (Na)= 1s^2, 2s^2, 2p^6, 3s^1
(Na+) = 1s^2, 2s^2, 2p^6
f. Nitrogen (N) = 1s^2, 2s^2, 2p^3
(N^3-) = 1s^2, 2s^2, 2p^6

So this is pretty much it,i believe. Sorry about the errors you'll see, if there's any. If you do see an error please don't hesitate to correct me. So this is chemistry for this friday and for all you chemist students dont forget that we have a test this coming tuesday or wednesday i believe.

The next scribe is jen2x: )