After moving down a group in the periodic table, the number of valence electrons

Iwill give extra points to who gets this right

Which of these best describes an ionic bond?

What type of interaction occurs between the r groups of valine and isoleucine in a tertiary structure? view available hint(s) what type of interaction occurs between the r groups of valine and isoleucine in a tertiary structure? salt bridge disulfide bridge hydrogen bond hydrophobic interaction