Final answer:
Markovnikov's rule states that in the addition of H-X to an alkene, the hydrogen becomes attached to the carbon atom that is already bonded to more hydrogens.
Step-by-step explanation:
Markovnikov's rule states that in the addition of H-X to an alkene, the hydrogen becomes attached to the carbon atom that is already bonded to more hydrogens. This means that the hydrogen will preferentially attach to the carbon that has more hydrogen atoms already bonded to it. This rule helps predict the regioselectivity of the addition reaction.