{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

25 Ionic and Covalent Bonding - Chapter 9 Electronic...

Info icon This preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 9 1 Presentation of Lecture Outlines, 9 1 Electronic Configuration - review Solution to the Schrodinger equation for an electron in an atom. The „ confinement ‟ of an electron results with discretization of the electron properties This is resulting with several types of quantum numbers These numbers describe the state of the electron ' '' ''' '''' ( , , ; , , , ) ( , , ) ( , , ) ( , , ) ( ) l s l s n l m m E x y z n l m m x y z x y z x y z spin Presentation of Lecture Outlines, 9 2 Electronic Configuration - review The electron state is described by discrete values - quantum numbers. Each set of numbers corresponds to a solution of the hydrogen atom . These solutions are slots to use for occupying electron in multielectron systems Pauli principle and Hund rule as guides. Aufbau principle and sub shell notation Presentation of Lecture Outlines, 9 3 Review- Atomic properties Atomic Radii Ionic potential Electron affinity Periodic Properties ionization energy Ionization energy: energy needed to remove an electron cation formation. first ionization energy : minimal energy needed to remove the first electron This is the (outermost) electron. For lithium atom, the first ionization energy is related to: e ) s 1 ( Li ) s 2 s 1 ( Li 2 1 2 Ionization energy = 520 kJ/mol Presentation of Lecture Outlines, 8 4 Ionization potential Alkali metals reactivity is marked by tendency to lose an electron low potentials Noble gases expect higher potential Presentation of Lecture Outlines, 9 5 Periodic Properties- ionization energy Follows the trend in size  more difficult to remove an electron that is closer to the nucleus Within a period ionization energies increase with Z. Exception upon emptying a sub shell: as 2s 2 2p 1 , etc (see figure) Also 2s 2 2p 4 is an exception Within a descend in group: ionization energy decreases Presentation of Lecture Outlines, 9 6
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon