The ångström (represented by the symbol Å) is a unit of length equal to 1 x 10^-10 m.

The distance between two atoms that are bonded to each other in a molecule is typically of the order 1 x 10^-10 m, but this is more easily expressed in ångströms. For example, a carbon-carbon (C-C) single bond of length 1.54 x 10^-10 m is often written as 1.54 Å. However, the ångström is not an SI unit.

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