Which statement about electrons is true

Can someone me with questions 15 to 17 plz.

Which of these statements explains the difference between nuclear binding energy and the strong nuclear force ?

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