Which of these formulas CI2 . Kci or no2 represents both and element and a molecule

Idon’t know how to solve this question

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

Which three statements represent the benefits of performing experiments using computer simulations?