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Valence Electrons

Valence Electrons. Def: the electrons in an atom’s outermost orbitals (usually the highest principal energy level) Write the noble-gas configurations for: Sulfur Cesium Francium The “leftover” electrons are the valence electrons!!!. Valence Electrons (cont.).

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Valence Electrons

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  1. Valence Electrons • Def: the electrons in an atom’s 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

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