Valence%20Electrons

1
Valence Electrons

• Def the electrons in an atoms outermost
  orbitals (usually the highest principal energy
  level)
• Write the noble-gas configurations for
• Sulfur
• Cesium
• Francium
• The leftover electrons are the valence
  electrons!!!

2
Valence Electrons (cont.)

• Valence electrons are important in the formation
  of chemical bonds between atoms.
• They are represented visually by using
  electron-dot diagrams.
• Table 5-5, p.140
• Examples on the board.

3
Valence Electrons (cont.)

• IMPORTANT NOTE Dots may be placed in any order,
  on all four sides of the element symbol, then
  paired up until all are used.

4
Group Practice Self-Check

• P.141 23
• Assignment
• P.141 25, 26, 28
• P.147 81-82
• Workbook Assignment pp.29-30