1- What is an atom? Give one example of an atom found in the human body.
2- Define an ion.
3- What are covalent bonds and what types of atoms generally form these types of bonds? Give one example.
4- What type of bond is used to from NaCl? How does this type of bond differ from a covalent bond?
5- What type of bond is used to keep one molecule of DNA (one DNA strand) wound in an alpha helix around a second molecule or strand of DNA?
6- Draw two molecules of water and then draw an label the type of bond that holds one molecule to the other.
7- What does Na+ signify?
8- Define electrolyte and give an example of one found in the body. Do any tissues or cells in the body conduct electrical currents? Why?
9- What % of the adult human body weight is made up of protein? What percentage is made up of nucleic acids? What percentage is carbohydrate?
10- What is the name of the following molecule and what is the name of the bond shown with an arrow?
11- What does the pH scale measure? If you had a solution with a pH of 6 and another with a pH of 7, which one would have the most hydrogen ions in it?
12- If one were to increase the number of H+ in a solution with a pH of 3 by 10 times, what would the pH of the new solution be?
13- What is the normal pH range for the plasma of the blood in humans? What type of solutions help to keep it in this range?
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