How many hydrogens are attached to each of the indicated carbons in morphine?

Valency refers to the ability of an atom to bond with other atoms, typically determined by the number of electrons in its outer shell. In organic chemistry, carbon typically forms four bonds, which can include bonds with hydrogen atoms. Understanding how many hydrogen atoms are attached to each carbon in a molecule like morphine requires knowledge of carbon's tetravalency and how it interacts with other atoms in the structure.

Skeletal structures are simplified representations of organic molecules that show the arrangement of atoms and bonds without depicting all hydrogen atoms explicitly. In these diagrams, carbon atoms are implied at the junctions and ends of lines, while hydrogen atoms are often omitted for clarity. Recognizing how to interpret skeletal structures is essential for determining the number of hydrogen atoms attached to specific carbons in a compound like morphine.

Functional groups are specific groups of atoms within molecules that are responsible for the characteristic chemical reactions of those molecules. In morphine, various functional groups, such as hydroxyl (-OH) and amine (-NH), influence the molecule's properties and reactivity. Identifying these groups helps in understanding how they affect the bonding and hydrogen attachment to the carbon skeleton.