9/26 Biology update and homework due 10/3

Hi folks,

Today we did a whirlwind tour of basic chemistry in order to get everyone ready for the upcoming "Basic Molecules of Biology" block of class.  Here's the link to my favorite (yes, I'm geeky enough to have a favorite) periodic table website.

Homework due 10/3 is to;

Read the book pgs. 31- 34

Do Section I Review on pg. 34 #'s 1-6 and 8.

Answer the following questions:

(I've included the answers below so that you can check your work.  Be sure you understand these, quizzes are coming.)

1. Draw the probable bonds for the following elements:

a.  O      b.   C      c.  I       d.  Tl      e. Al      f.  Mg

2.  Name an element that has:

a. 3 valence electrons

b. 1 valence electron

c. 8 valence electrons

3.  Draw the following molecules (use as many atoms as you need to make the bonds)

a. Li & Br

b. Mg & Te

c. K & P

d. O & O

e. N & N

f. C & O

g. C & H

h. C & O & H

Answers (no peeking until your done!)

1. Hard to draw with email so I'll just give #.  a.  2  b.  4  c.  1  d. 3.  e. 3    f.  2

2.  a.  Boron or anything under it, or Nitrogen and anything under it.

b. Hydrogen or anything under it, or Florine and anything under it.

c. Neon and anything under it.

a.  Li-Br

b. Mg=Te

c. P with 3 K's around it

d. O=O

e. N triple bond N

f. O=C=O

g. Many ways but the simplest is C with 4 H's around it

h.  Many ways but one is C=O and put 2 more H's around the C