Explore BrainMass
Share

Explore BrainMass

    Electron Configuration and Lewis Structures

    This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

    How many electrons should appear in the Lewis structure of the following:
    H3O+
    SCN-
    HCO3-
    O2-
    N2O4
    BF3

    Determine the formula change on the following
    Cl-O
    ClO4-

    © BrainMass Inc. brainmass.com October 9, 2019, 5:35 pm ad1c9bdddf
    https://brainmass.com/chemistry/bonding/electron-configuration-and-lewis-structures-61571

    Solution Preview

    Lewis electron count:

    H3O + : The number of electrons on O are 6.
    The number of electrons on H atom are 1.
    Number of H atoms bonded to O by covalent bonds are 2.
    Number of H atoms bonded to O by co-ordinate covalent bond are 1, this H atom
    does donate an electron and hence the total electron count = 8.
    SCN- : The number of electrons on C = 4
    The number of electrons on S = 6
    The number of electrons on N = 5
    The negative charge indicates an additional electron
    Thus the total electron count = 16.
    HCO3- : The number of electrons on C = 4
    The number of electrons on H = 1
    ...

    Solution Summary

    This solution determines the number of electrons on each element of a molecule as well as their formal charge to show how many electrons should appear in the Lewis Structure. The refractive index and mole fraction is used to determine formula change.

    $2.19