BIOL 220 - Chapter 2: The Chemistry of Life

Element

Click the card to flip 👆

1 / 21

Terms in this set (21)

The simplest form, has unique properties
- contains protons, neutrons, and electrons

There are _____ naturally-occurring elements, but only _____ have physiological roles.

6 of the elements, C, O, H, N, Ca, and Ph make up ________ of our body weight.

- sharing of electrons
- typically between atoms closer together on the periodic table
- when atoms have similar e- affinity
- single bond

What are covalent bonds?

- The attraction between slightly (+) H and (-) O or N charges
- weak bonds
- ex. Water, DNA, Proteins

What are hydrogen bonds?

Substances that are blended but not chemically combined

- age
- sex
- fat content

H₂O makes up 50%-70% of our body weight depending on:

Particles mixed within a solvent

- particles are under 1 nm
- do NOT scatter light
- pass through selectively permeable membranes, such as dialysis tubing and cell membranes
- will NOT separate on standing

What are some characteristics of solutions?

Mixture of protein and water