The F major ninth chord is a 5-note chord consisting of the notes F, A, C, E and G.
You can see these notes highlighted in the interactive piano chart below.
The chord itself is often abbreviated as Fmaj9.
Chords that are a superset of Fmaj9. The chords include more notes but always F, A, C, E and G.
Chords that are a subset of Fmaj9. These contain less notes but all of them are included in Fmaj9.
In case you prefer a non-interactive variant of the chord chart, we've embedded a PNG image below that shows the notes for the the Fmaj9 chord. Feel free to save or share the image as needed.