Gained or lost to make a molecule more stable; they may also be shared, as in covalent bonds. a. atomic neutrons b. valence electrons c. protons and neutrons d. atoms

Complete this brønsted-lowry reaction placing each product by its appropriate label. hso4- + hcn

Imagine that you have produced several versions of lactase, each of which differs from normal lactase by a single amino acid. describe a test that could indirectly determine which of the versions significantly alters the three-dimensional shape of the lactase protein.

In numbering carbon atoms in the parent chain of a hydrocarbon, why would you number from right to left, rather than left to right