Three compounds that contain an element from Group 18 are XEOF, XeO,F2, and XeF4. Possible Lewis electron dot diagrams for the compounds are shown below. :ö: :0: :F: :0: || :F :0: || E-Xe-F: :O: :0: :ö: A D E (c) Which structure, B, C, or D, minimizes the formal charges for each atom in XeO,F2 ? Justify your choice

Use the information on the fictious nonmetal elements. to answer the following Element Colomn EN ff 1.9 14 17 3.1 2.3 3.6 15 Nn 16 Shoos one of the followng mokcular compounds and completc the queSTIons: Nn Oyzlshape is benti V) ODraw a leuis Structure Shoudng all lalonce electrons. ) Calculate the electrongativity the bond. State what a paar covalert band, notate the partial difference for Gf bond will form If it is charges d) Detamine if the molecule is polar or polar. non-

calculate the formal charge on the nitrogen in the following structure

Consider the following structures of the sulfate ion: 2- :Ö: :0: I Which statement below is false? 0 II :0= These are resonance structures. :0: S 1 0 III 2. The formal charge on sulfur is different in all the three structures. Structure III contributes most to the true structure of the sulfate ion than structures I and II. Structure I contributes most to the true structure of the sulfate ion than structures II and III.

central atom underlined: NH3O ICl3 XeO3 C4H4 O.R.-Lewis structure: Remember to always: • Show charge, if present. • Draw at least one more equivalent resonance structure (with «) if present, to describe delocalized covalent bonding.         count all lone pairs in LS:         polar: Y/N?

A hypothetical molecule, X–Y, has a dipole moment of 1.94 D and a bond length of 113 pm. Calculate the percent ionic character of this molecule.   Percent ionic character: ?

The formal charge on carbon in CO 3 2- is :0: 지 :0: :0: +2 +4 -4 +1 0 where the Lewis structure of the ion is:

Write Lewis structures for the following molecules or ions, which have central atoms that do not obey the octet rule:

Consider the incomplete structure. Add formal charges as necessary to the structure.  What is the net charge on the species? a) +1 b) 0 c) +2 d) −1 e) −2