Alternative text (alt text) is meant for readers who cannot see an image, such as blind readers and readers who use a text or mobile browser. It should summarize an image's purpose, and should not duplicate its caption. Every image should have alt text, except for purely decorative images, which should instead have "
The following table shows images and captions on the left, and alt text and captions on the right: the right column is what a visually impaired reader will hear. This table was computed from the copy of Noble gas cached on 16 May 2013 at 17:00.
|Image and thumbnail||Text description|
Image: Helium discharge tube
Image: Neon discharge tube
Image: Argon discharge tube
Image: Krypton discharge tube
Image: Xenon discharge tube
Image: Radon, glowing gas
A line spectrum chart of the visible spectrum showing sharp lines on top.
A graph of ionization energy vs. atomic number showing sharp peaks for the noble gas atoms.
An atomic shell diagram with neon core, 2 electrons in the inner shell and 8 in the outer shell.
A model of planar chemical molecule with a blue center atom (Xe) symmetrically bonded to four peripheral atoms (fluorine).
A skeletal structure of buckminsterfullerene with an extra atom in its center.
Schematic illustration of bonding and antibonding orbitals (see text)
A large solid cylinder with a hole in its center and a rail attached to its side.
Cigar-shaped blimp with "Good Year" written on its side.
Elongated glass sphere with two metal rod electrodes inside, facing each other. One electrode is blunt and another is sharpened.
Glass tube shining violet light with a wire wound over it
Glass tube shining orange light with a wire wound over it
Glass tube shining purple light with a wire wound over it
Glass tube shining white light with a wire wound over it
Glass tube shining blue light with a wire wound over it
Glass tube shining light red
Glass tube shining reddish-orange
Glass tube shining purple
Glass tube shining bluish-white
Glass tube shining bluish-violet
Illuminated light red gas discharge tubes shaped as letters H and e
Illuminated orange gas discharge tubes shaped as letters N and e
Illuminated light blue gas discharge tubes shaped as letters A and r
Illuminated white gas discharge tubes shaped as letters K and r
Illuminated violet gas discharge tubes shaped as letters X and e
Helium line spectrum
Neon line spectrum
Argon line spectrum
Krypton line spectrum
Xenon line spectrum
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