Chromatic Scale Definition

Chromatic Scale Frequency Chart and Definition

The image below show the 12 tones of the C chromatic scale from C3 to C4 (middle C). There are 13 notes shown as the Octave C is reflected in the table. C4 is exactly twice the frequency of C3 and this indicates the repetition of the root tone at the next higher frequency or octave. The small box to the side of the table shows the division of Middle C's frequency (261.626) by the frequency of B (246.942) that results in the 1.0594 ratio. Each adjacent pair of notes in the scale share the same ratio when the frequencies are divided as shown. These two mathematical truisms are the key to Western music's chromatic scale.

A Chromatic scale is a scale that incorporates 12 tones. The notes are spaced in a manner so that the are tonally equal from each other.

Wikipedia says;
"The chromatic scale is a musical scale with twelve pitches, each a semitone above or below its adjacent pitches…Moreover, in equal temperament, all the semitones have the same size (100 cents). As a result the notes of an equal-tempered chromatic scale are equally spaced."

https://en.wikipedia.org/wiki/Chromatic_scale

The diagram immediately below shows the 12 tones of a chromatic scale with flat and sharp symbols.

The diagram below shows the flat and sharp tones that are incorporated into a 12 pitch chromatic scale based on the root note of C.

The following shows the chromatic scale beginning with the A note on the 5th fret of the low-E string. The individual notes are arranged with a 4 notes per string pattern. The scale has 12 notes and then repeats.