201-03-chapter9_handouts

201-03-chapter9_handouts - Chapter 9 Chemical Bonding I:...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Valence electrons are the outer shell electrons of an atom. The valence electrons are the electrons that participate in chemical bonding. 1A 1 ns 1 2A 2 ns 2 3A 3 ns 2 np 1 4A 4 ns 2 np 2 5A 5 ns 2 np 3 6A 6 ns 2 np 4 Group # of valence e - e - configuration Chapter 9 Chemical Bonding I: Basic Concepts 7A 7 ns 2 np 5 Lewis Dot Symbols for the Representative Elements & Noble Gases
Background image of page 1

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

View Full DocumentRight Arrow Icon
Li + F Li + F - The Ionic Bond Li Li + + e - e - + F F - F - Li + + Li + F - Ionic bond: the electrostatic force that holds ions together in an ionic compound. Electrostatic (Lattice) Energy Lattice energy (U) is the energy required to completely separate one mole of a solid ionic compound into gaseous ions. Based on Hess’s law, Born-Haber cycle, relates lattice energies of ionic compounds to ionization energies, electron affinities, and other atomic and molecular properties.
Background image of page 2
A covalent bond is a chemical bond in which two or more electrons are shared by two atoms. Why should two atoms share electrons? F F + F F Covalent compounds are compounds that contain only covalent bonds. Octet rule ― an atom tends to form bonds until it is surrounded by eight valence electrons. ― works mainly for elements in the second period of the periodic table Lewis structure is a representation of covalent bonding in which shared electron is a representation of covalent bonding in which shared electron pairs are shown either as lines or as pairs of dots between two atoms, and lone pairs are shown as pairs of dots on individual atoms. Lone pairs
Background image of page 3

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

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 02/10/2011 for the course CHEM 201 taught by Professor Griffen during the Fall '09 term at Bunker Hill.

Page1 / 10

201-03-chapter9_handouts - Chapter 9 Chemical Bonding I:...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online