A Tale of Seven Elements by Eric Scerri
English | 2013 | ISBN: 0195391314 | 304 pages | PDF | 1,5 MB
In 1913, English physicist Henry Moseley established an elegant method for "counting" the elements based on atomic number, ranging them from hydrogen (#1) to uranium (#92). It soon became clear, however, that seven elements were mysteriously missing from the lineup–seven elements unknown to science.