Use principles established in this chapter to arrange the following atoms in order of increasing value of the first ionization energy: Sr, Cs, S, F, As.
Chapter 7: Periodic Properties of the Elements Charge and Distance and Electrons in Orbitals Zeffhe effective nuclear charge. Refers to the protons in the nucleus, not the overall charge of the atom For multiple electrons we must consider their approximate location in the atom, and the matter in which they “shield” each other An electron in a 1s orbital experiences a very strong attraction since 1) the distance is close, and 2) there are no negative electrons “blocking” the positive charge of the nucleus For electrons in other orbitals, there are negative charges frequently between the electron and nucleus. These electrons “shield” ………… Simplest Model: Effective Nuclear Charge Core electrons effectively shield o
