1. The Chemical Context of Life
Chapter 2
The Chemical Context of Life

2. I. Basic Chemistry
__________is anything that takes up space and has mass.
1.________ cannot be broken down by chemical reactions.
2. ____________ consist of 2+ elements.
Organized matter has emergent properties…

3. A. Living things require _______ different elements.
1. 96% of living things are
made of 4: C, O, H, & N.
2. P, S, Ca, K, I, Fe and
few others =4%
A lack of iodine leads to goiter…
Many countries fortify salt
with iodine.

4. II.Atoms and Molecules The _______ _________ is the number of protons.
The ______ _______ is the sum of protons + neutrons.(_______ weight is the same)

5. A. ____________ have the same # of protons, but differ in the # of neutrons. Many are radioactive (unstable).

6. III. Chemical Bonding
A. ___________ Bonds-electrons are shared.

7. B. _______ __________ Bonds (electrons are shared unevenly)

8. C. ________ Bonds (weak electronegative interactions between hydrogen containing molecules)

9. D. ________ Bonds (electrons are given up/taken)

10. E. van der Waals interactions
What is it?
It is an electrostatic attraction between opposite charges.
It is a _________ force of attraction.

11. F. Chemical reactions make and break bonds…