4> 134. Although both Br3 and Iz ions are known, the F3 ion has not been observed. Explain. 101 ond 102 Would Vou make the

Draw octet rule molecular Lewis structure for: CClO+ S2O32- SCl2O22-

Recall that nitrogen triiodide (NI3) is very shock-sensitive. Forming F2(g) from F− ions releases much more energy than forming I2(s) from I− ions. Why is nitrogen trifluoride (NF3) a stable compound?

8. Based on the formula of the following molecules, write down the noble gas configuration of the cation (metal ion). a. V,O5 b. CuCl, c. KMNO4

To explain why AHan for RbCl is different than that for KCI, the student investigates factors that affect AHoln and finds that ionic radius and lattice enthalpy (which can be defined as the AH associated with the separation of a solid crystal into gaseous ions) contribute to the process. The students consults references and collects the data shown in the table below. lonic Radius (pm) lon к' 138 Rb* 152 b. Using principles of atomic structure, explain why the Rb' ion is larger than the K' ion

Which of the following is most likely to form a +2 ion? A) K B) Sc C) Al D) O E) Mg

H,BO, SF, XeO. H-Ö-B-O-H I :0: I H .. :F .. :0 .. 1 - :F: :0-8-0: .. .. - Xe − 0: Yes, it's a reasonable structure. No, the total number of valence electrons is wrong. The correct number is: No, some atoms have the wrong number of electrons around them. The symbols of the problem atoms are: Yes, it's a reasonable structure. No, the total number of valence electrons is wrong. The correct number is: No, some atoms have the wrong number of electrons around them. The symbols of the problem atoms are: Yes, it's a reasonable structure. No, the total number of valence electrons is wrong. The correct number is: No, some atoms have the wrong number of electrons around them. The symbols of the problem atoms are:

DETERMINE molecular structure of PTFE

Assign the following as Ror S. 3. Bl но, он NH2 Br Br

s than 4 BONDS CH3CH2 NH2 Practice 17 For the compounds below identify all covalent and all ionic substances NaHCO3 CH,CH,NH, CF₁ CH3COONa Explain, using one of the covalent compounds as an example, how you came to an inference that it is covalent. Make sure to discuss why it cannot be ionic in terms of the valence electrons each atoms has and how covalent bond allows it to obtain stability. ● ● Explain, using of the ionic compounds above as an example, rationale for your decision that it is ionic. Make sure to discuss how and why atoms become ions and why covalent bond is not possible in this case. • For all covalent compounds above draw Lewis structures showing correct number of bonds and lone pairs for each atom H H NH- 0202 H H I -C-N-H I H " F-C-F: : F: • For all ionic compounds determine and show charges of mono and polyatomic ions. Draw Lewis structures for all polyatomic ions. 15