What are non examples of volume

Which of these best describes an ionic bond?

Gwhich r group would most likely be found in a hydrophobic area of the tertiary structure of a globular protein? which r group would most likely be found in a hydrophobic area of the tertiary structure of a globular protein? −ch2−oh −ch2−o||c−nh2 −ch2−coo− −ch2−ch2−ch2−ch2−n+h3

If anyone would be able to me out with these three questions it would be these are from the chem 2202 course.