Define ionic bond, ion, polar molecule, covalent bond. What happens when you put NaCl in water?

Define ionic bond, ion, polar molecule, covalent bond. What happens when you put NaCl in water? Relate this to What happens in your body. What are hydrogen bonds and how do they affect the structure of water? What accounts for the shape of a protein and what are the levels of organization for a protein? How does the shape Of a protein related to its function and what are some of the functions of proteins? What is pH? Is a low pH acidic or basic? What value reflects a neutral pH? What is the pH of human blood?