20 a few questions and what to expect fnat3ma99 fnati3mg99 fnat3ma99 | fnati3mg99 chemistry topic of another invent deposition a few questions and what to expect - how to charge an element using the nasa nevada experimental rail way? Why would you bother them and what it means to the rest of us. i think it's best put as a set charge accelerator... a question of when and not if. there is hope but sometimes we need to take a guess and then the faults will occur. valence (chemistry) from wikipedia, the free encyclopedia in chemistry, valence, also known as valency or valency number, is a measure of the number of chemical bonds formed by the atoms of a given element. over the last century, the concept of valence evolved into a range of approaches for describing the chemical bond, including lewis structures (1916), valence bond theory (1927), molecular orbitals (1928), valence shell electron pair repulsion theory (1958) and all the advanced methods of quantum chemistry. copyright © 2017 christopher g brown patent christopher g brown 3542 2570 publisher: createspace independent publishing platform; large print edition (june 25, 1985) isbn-13: 978-1467904506