A piece of chain is called a "link".
Anachronistic.
englishman in new york - sting & union - the black eyed peas
prelude
Having the form and musical quality of a song or something written on a piece of paper. (You don't have to write down " or something written on a piece of paper")
Solo
A small piece or part of something like a piece of glass is called a shard.
A small piece or part of something is called a portion of whatever the thing is.
A speech or piece of writing praising something is called a eulogy or tribute. It is a formal expression of admiration, reverence, or appreciation for someone or something.
Anachronistic.
The part of something is called a component. It is a piece or element that makes up the whole of an object or system.
A piece of wood set upright to support something is called a "post." It is commonly used to provide structural support or as a boundary marker.
A material covering a hole is called a patch. It can be used to repair damage or prevent something from escaping.
A small piece of something, like chocolate, could be referred to as a "bite" or a "morsel."
It may be called a 90 degree section , or 1 fourths of a circle.
Slab
A small piece of soot is called a "smut."
One piece of garlic is called a "clove."