Perhaps a slight modification

SODIUM CHLORIDE

[G]Just a little [D7/F#]atom of chlorine, valence [Em]minus one[D/F#]
[G]Swimming through the [D7/F#]sea, diggin' the scene, just [Em]havin' fun[G aug]
[C]She's not worried about the [Em7/B]shape or size of her [Am]outer shell--
[A7]it's fun to ionize
[G]Just a little atom of [D7]cl with an unfilled [G]shell. [D7]

And the Am might be a C and the A7 might be a C#dim - can't quite decide. Closish though :)