2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/146268An earlier finding that the van der waals radii are related to their de broglie wavelengths for some non-metallic elements has been extended here to show that in fact, they vary linearly with the ground state bohr radii for all the elements of groups 1a to 8 a. Similarly, the valence shell radii and the covalent radii are shown to be linearly dependent on the bohr radii. One table of data and 5 figures have been provided here showing that all the above radii are sums of two lengths, one of which is a multiple of the bohr radius and the other, a positive or negative constant for each group of elements.12 pages, one photo, 1 table, 5 figures: Presented as Ohtaki Memorial Lecture, 10th Eurasia Conference on Chemical Sciences, Manila, January, 2008General PhysicsChemical Physicstext