How chords are built?

Combining particular notes from a musical scale creates chords. Understanding the intervals between the notes that make up a chord is necessary to comprehend how chords are built. The distances between the pitches are referred to as intervals and are measured in whole steps (also known as tones) or half steps (also known as semitones). Triads (three-note chords) and seventh chords (four-note chords) are the two most popular kinds of chords. The chords are made of:

Triads: A triad is made up of the root, third, and fifth notes. The other notes are formed on top of the root, which serves as the chord’s primary note. The third and fifth notes decide whether a chord is major or minor.

Major Triad: From the root to the third, there is a major third (4 half steps), and from the third to the fifth, there is a minor third (3 half steps).
Minor Triad: From the root to the third, there is a minor third (3 half steps), while from the third to the fifth, there is a major third (4 half steps).

Seventh chords are made up of four notes: the root, the third, the fifth, and the seventh. Major seventh, minor seventh, dominant seventh, and reduced seventh chords are all varieties of seventh chords.

Major Seventh Chord: From the root to the third, it has a major third (4 half steps), a minor third (3 half steps) from the third to the fifth, and a major third (4 half steps) from the fifth to the seventh.
Minor Seventh Chord: It has a minor third (3 half steps) from the root to the third

Dominant Seventh Chord: From the root to the third, it has a major third (4 half steps), a minor third (3 half steps), and a minor third (3 half steps) from the fifth to the flat seventh (seven half steps below the root).

Diminished Seventh Chord: A minor third (3 half steps) connects the root to the third, a minor third (3 half steps) connects the third to the diminished fifth (six half steps below the root), and a major third (4 half steps connects the diminished fifth to the diminished seventh (nine half steps below the root).a major third (4 half steps) from the third to the fifth, and a minor third (3 half steps) from the fifth to the seventh.
The dominant seventh chord has a major third (4th).

Once you grasp the intervals that make up a chord, you can use this knowledge to form chords on any musical scale. In the key of C major, for example, the C major triad is C-E-G, while the C major seventh chord is C-E-G-B. The A minor triad is A-C-E, while the A minor seventh chord is A-C-E-G in the key of A minor.

Remember that chords can be performed in numerous places and inversions on the guitar or piano, resulting in different voicings and tones for the same chord.