CH 101 Lecture Notes - Lecture 5: Atomic Orbital, Bohr Model, Electronegativity
Document Summary
Chapter 3 valence electrons, zeff, and periodic trends. Outermost s electrons and any partially filled subshells. Periodic trends: early observations led to development of periodic table, repetition of properties by row (period, periodic table ordered by increasing atomic number (z, position on periodic table allows us to make predictions about physical and chemical properties. Effective nuclear charge (zeff: zeff actual nuclear charge experienced by specific electron. Zeff = z : valence electrons are attracted to the ____________ and repelled by other. ___________ ( push and pull : sodium example, within group, shielding ability (cid:1) as n (cid:2, within row, shielding ability: s > p > d > f. Atomic radius (cid:1) n (cid:2) more shells are added to atom, size does what? (cid:1) (cid:1) zeff (cid:2) (across period); electron cloud contracts due to what? r n2. Orbital energy: use bohr model to approximate, measure of how tightly electron is bound.
