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Sonata-allegro form is a form with three main divisions: exposition, development and recapitulation (a coda is frequently added). It is not same as binary or ternary forms. The sonata form is a form itself.
ternary
Binary
Sodium phosphate is a ternary salt.
Unitary binary and ternary
Repitition and Contrast.
This is determined by chemical analysis.
Binary form has 2 sections,Ternary form has 3 sections.
Hydrogen chloride is a binary compound.And it is binary because contain only two elements: hydrogen and chloride.
Binary form showcases a two part melody commonly displayed as: AB Sometimes there exists what we call "rounded binary" where the first theme reccurs (ABA) albiet with a slight change. Ternary is a three part melody where the beginning returns at the end (ABA) This may seem similar to rounded binary but there are a few notable disparities. Binary=AB Ternary=ABA
In this context, "Jack and Jill" typically refers to a binary system where there are two parties involved. If it is not binary or ternary, then it could potentially involve more than two or three parties, making it a multipartite system.
In music Binary, Ternary and Rondo are like the layout of a song. So say A represents a verse, B a chorus and C would represent a Bridge! Binary would be A,B (Verse, chorus) Ternary would be A,B,A (Verse, chorus, verse) Then Rondo would be A,B,A,C,A (Verse, chorus, verse, bridge, verse)