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Electron Dot (Lewis) Structures A Lewis or Electron Dot Structure is a convenient representation of the valence electrons in an atom. An electron dot structure for an atom is simply the symbol for the element, surrounded by a number of dots equal to the number of valence electrons.
Lewis Dot Structure Worksheet: In the first box below the formula, write your first impression of the Lewis formula. In the second box, calculate S/2/B and identify bonding around central atom.
Draw the Lewis Structures for each of the following molecules. If you are not sure if your structure is correct, do a formal charge check. You should consult the Lewis structure rules and a periodic table while doing this exercise.
Answer the following questions and check your answers below. These problems are for practice only will not be graded. Be sure you know how to draw correct Lewis Dot Structures and are able to correctly predict the electronic arrangement and molecular geometry before going on to the lab assignment.
Write the chemical equations for these combustion reactions using Lewis structures instead of chemical formulas. Many planets in our solar system contain organic chemicals including methane (CH 4) and traces of ethylene (C 2 H 4), ethane (C 2 H 6), propyne (H 3 CCCH), and diacetylene (HCCCCH).
Lewis Dot Structure Mega Worksheet 1) What is the octet rule? Explain its role in bonding between atoms. 2) Indicate how many electrons must be gained or lost by each of the following atoms to achieve a stable electron configuration, e.g. 3 lost, 2 gained, etc.? a) Sr b) Sb c) Si d) S e) Se f) Xe
Useful Ideas to Consider When Drawing Lewis Structures. Arrange atoms so that the central atom has the lowest electronegativity. Determine the number of valence electrons. Place one electron pair between bonded atoms to form a single bond.
