CHM 120 Lecture Notes - Lecture 14: Noble Gas, Nonmetal, Isoelectronicity
Document Summary
Outer electron configuration- the electron configuration of the outer most shell. N=1 this is the principle quantum # and it indicates the period and what the outer most shell will be. You continue in this way for all groups except group 8! He is an exception with only 2 valence electrons, all the other noble gases have 8 valence electrons. Valence electrons- are held loosely, so they can be easily lost of sharded and are. The subshells being filled for elements in various parts of the periodic table: F block- lanthanides and actinides (14 elements each) Write the electron configuration for p bases on its position in the periodic table: For ne 2s and 2p orbitals are completely filled. The chemical properties of elements are largely determined by the number of valence electrons they contain. Atoms with 8 or 2 valence electrons are particularly low in energy (stable)
