SEARCH Articles Figures Tables A Self-Consistent Field Variational Calculation of IP for the Helium Atom Atomic force microscopy temperature variation Atomic mass variations Atomic radius periodic variation Atomic ratios with density, variation Atomic size variations Atomic surface variation Atomic variation principle Atoms linear variation theory Atoms valence-electron structure variation Atoms variation theory Bond strength variation with atomic Carbon atoms, energy variation Discrete variational linear combinations atomic orbitals Helium atom variation method application Helium atom variation treatment Natural Variations in Relative Atomic Mass Nonlinear Variation The Helium Atom Nonlinear Variation The Hydrogen Atom Periodic table atomic radii, variation Radius variation with atomic number Relative atomic mass variations Summary of the atomic variation principle Variation method applied to helium atom Variation method applied to hydrogen atom in electric field Variation method for helium atom Variation of the atomic action integral Variational basis for atomic properties Variational derivation of the atomic force law Variational derivation of the atomic virial theorem Variational methods, complex atoms Variational theory multi-electron atoms Variations in Atomic Size