11. Bonding & Molecular Structure

How many valence electrons should be used in the Lewis structure for the polyatomic ion SO₄³⁻?

(b) With what allotrope of oxygen is it isoelectronic?

Write the Lewis structure for each molecule or ion. c. BrO-

Write the Lewis structure for each molecule or ion. b. OH-

Write a Lewis structure that obeys the octet rule for each ion. Include resonance structures if necessary and assign formal charges to each atom. a. ClO3- b. ClO4- c. NO3- d. NH4+

Identify the correct electron-dot structure for XeF 5+. (a)

(b)

(c)

Draw the Lewis structure for NO+ . Is the nitrogen– oxygen bond in NO+ longer, shorter, or the same length as the nitrogen–oxygen bond in NO? Explain. Draw the Lewis structure for NO+ .

Write Lewis structures for each molecule or ion. Use expanded octets as necessary. b. AsF6-

Some theories of aging suggest that free radicals cause certain diseases and perhaps aging in general. As you know from the Lewis model, such molecules are not chemically stable and will quickly react with other molecules. According to certain theories, free radicals may attack molecules within the cell, such as DNA, changing them and causing cancer or other diseases. Free radicals may also attack molecules on the surfaces of cells, making them appear foreign to the body's immune system. The immune system then attacks the cells and destroys them, weakening the body. Draw Lewis structures for each free radical implicated in this theory of aging. d. CH3OO (unpaired electron on terminal oxygen)

Ammonium chloride, NH4Cl, is a very soluble salt in water. (a) Draw the Lewis structures of the ammonium and chloride ions.

Which of the following correctly represent the placement of electrons around each atom?