the same symbol is also used for a unit of length (the first Bohr radius) for a unit of electric moment and, in quantum field theory, for a quite different energy. To compound the confusion ...

Bohr Radius: The maximal radius within the open unit disk for which the sum of the absolute values of a power series’ coefficients, when multiplied by the corresponding powers of the radius ...

So far, few objects afford a design accuracy better than 5 nmand the subnanometre scale has been reached only within the unit cells of designed DNA crystals ... which is slightly less than the Bohr ...

The radius of this circle in the hydrogen atom is called the Bohr radius and has a value of 0.529 angstrom units (1 angstrom = 10 {+-}{+1}{+0} m). The mass of an electron is 9.109 x 10 ...