According to Hund’s rule,

The shortest covalent bond between generic atoms A and B is: 

Use the difference in electronegativity values to arrange the bonds in order of increasing polarity (the least polar first)

According to the Aufbau principle,  

 Draw a Lewis dot structure for the molecule of ClF3 and answer the questions related to the structure. Upload the picture of the Lewis dot structure for additional 2 pts grade along with the other required ones to the  Exam 2 Solutions (Lewis Structures), Extra Credit and Partial Credit assignment after you submit your exam. Number of nonbonding electron domains[Number] Molecular shape[shape] Hybridization[Hybridization] F-Cl-F angle(s)[Angle] [Polarity]Polarity(P- polar, NP – nonpolar)

The following element will gain two electrons and achieve the noble gas configuration when forming  the ion:

The correct formula of the ionic compound between barium and nitrogen in which both elements achieve the noble gas configuration is:

 Draw a Lewis dot structure for the molecule of PF5 and answer the questions related to the structure.  Upload the picture of the Lewis dot structure for additional 2 pts grade along with the other required ones to the  Exam 2 Solutions (Lewis Structures), Extra Credit and Partial Credit assignment after you submit your exam. Number of electron domains around the central atom[Number] Electron geometry[geometry] Molecular shape[shape] Hybridization[Hybridization] [Polarity]Polarity(P- polar, NP – nonpolar)  

The correct formula of the ionic compound between aluminum and phosphorous in which both elements achieve the noble gas configuration is:

Which two compounds contain ionic bonds:  SO3 ; N2;  NaF; CCl4;  LiCl; BF3;  HBr