Electron's dash is not horizontally centered when text size is changed

[Andrew15-5]

#import "@preview/typsium-atomic:0.1.0": atom-shells

#{
  // set text(6pt)
  atom-shells(element: "Cu")
}

#set line(length: 7pt, stroke: 0.1pt)
#place(top, dx: 11mm, dy: 13.35mm, line())
#place(top, dx: 20.8mm, dy: 13.26mm, line())

#import "@preview/typsium-atomic:0.1.0": atom-shells

#{
  set text(6pt)
  atom-shells(element: "Cu")
}

#set line(length: 7pt, stroke: 0.1pt)
#place(top, dx: 11mm, dy: 13.35mm, line())
#place(top, dx: 20.8mm, dy: 13.26mm, line())