Systematic Training for Effective Parenting Systematic Training for Effective Parenting Systematic Training for Effective Parenting (STEP) is a parent education program published as a series of books. STEP was developed and published by the psychologists Don Dinkmeyer Sr., Gary D. McKay and Don Dinkmeyer Jr. The publication was supplemented by an extensive concept for training and proliferation. STEP has reached more than 4 million parents and has been translated into Spanish, French, German, and Japanese. Korean and Chinese adaptations are in progress. STEP is based on Alfred Adler's individual psychology and the work of the psychologists Rudolf Dreikurs and Thomas Gordon. An evaluation of the
Effective atomic number interactions. For instance, lithium, atomic number 3, has two electrons in the 1s shell and one in the 2s shell. Because the two 1s electrons screen the protons to give an effective atomic number for the 2s electron close to 1, we can treat this 2s valence electron with a hydrogenic model. Mathematically, the effective atomic number Z can be calculated using methods known as "self-consistent field" calculations, but in simplified situations is just taken as the atomic number minus the number of electrons between the nucleus and the electron being considered. An alternative definition of the effective atomic number