CHEM 1021 Lecture Notes - Lecture 35: Atomic Number, Electron Configuration, Transition Metal
Document Summary
One more example from the bottom of the periodic table. [xe] ( , , , , , , (cid:895)/(cid:1008)f, (cid:894) , , , , There are 2 different ways to write the electron configuration. Review: pick the electron configuration below that represent elements in the same chemical family or group. [ne] 3s^2: [ne] 3s^2, 3p^3, [ar] 4s^1, 3d^10. Nobel gases: ne, kr 8 valance electrons. Transition metals: cu, mn, ag all have electrons in a d type sublevel. Valance electrons occupy orbitals in the valance level. All the other electrons are called core electrons, or inner electrons: are associated with the largest value of n. Core all the rest of the electrons: na 1 valance electron, 10 core electrons. Valance electrons electrons associated with largest value of n. Core electrons all the rest including the d electrons that come from filling the last orbitals.
