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Lewis Dot Structures

Learn how to write Lewis dot structures to represent elements and determine valence electrons, crucial for understanding chemical properties and bonding. Explore fun facts and easy methods for finding valence electrons with helpful practice examples.

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Lewis Dot Structures

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  1. Lewis Dot Structures Used to show an element and the number of valence electrons.

  2. Writing Lewis Dots • First write the chemical symbol • Second, determine the number of valence electrons • Draw the appropriate number of dots around the symbol making sure to put one dot on each side before putting a second dot.

  3. Fun Valence Electron Facts: • Valence electrons are the electrons in the highest occupied energy level of an atom. • It is the number of valence electrons that will determine the chemical properties of the element. • Valence electrons are the only electrons used in chemical bonds.

  4. Finding the Valence electrons • Since the element is not carrying a charge, there are equal numbers of protons and electrons. • Remember: The number of protons is equal to the atomic number. • Begin filling in the energy levels. When done, count the electrons in the outer shell. • OR, remember the shortcut. The group number of a main group element tells us the number of valence electrons. Group 1 has 1 valence electron, Group 2 has 2 VE.….etc.

  5. Practice: • Write the lewis dot structure for: • Al • N • C

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