Final answer:
Capsules are a solid dosage form for drugs enclosed in a shell, and an ionic compound is a solid formed of equal numbers of cations and anions held together by ionic bonds.
Step-by-step explanation:
A solid dosage form in which a drug is enclosed in a hard or soft shell is known as a capsule. Capsules are used to contain medicines in a variety of dosage forms and can be composed of gelatin or other substances that dissolve to release the drug once inside the gastrointestinal tract.
On the other hand, when we speak about solids in a chemical context, a substance formed of crystals of equal numbers of cations and anions held together by ionic bonds is referred to as an ionic compound. In the solid state, the individual particles of an ionic compound are in fixed positions and form a crystalline structure, which give solids their definite shape and volume.