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Valence electrons, Lewis dot structures, and ionic charge. Stable atoms have. 8 electrons (or 2 or 0 if they are small). Metal: sodium. Electron configuration: 1s 2 2s 2 2p 6 3s 1 Sketch of principal energy levels: (Na)2)8)1) Lewis dot structure: (see the board)
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Stable atoms have 8 electrons (or 2 or 0 if they are small)
Metal: sodium • Electron configuration: 1s22s22p63s1 • Sketch of principal energy levels: (Na)2)8)1) • Lewis dot structure: (see the board) • Formation of ion: electron removed: Na1+ • Cation = positively charged ion (pronounced “cat ion” not “kay-shun”)
Nonmetal: chlorine • Electron configuration: 1s22s22p63s23p5 • Sketch of principal energy levels: (Cl)2)8)7) • Lewis dot structure: (see the board) • Formation of ion: electron added: Cl1- • Anion = negatively charged ion
Stable atoms have 8 electrons (or 2 or 0 if they are small)