Possible Short Answers for Exam 3 1. Use grammatically correct English sentences
ID: 561916 • Letter: P
Question
Possible Short Answers for Exam 3 1. Use grammatically correct English sentences to describe the differences be tween polar covalent bonds, nonpolar covalent bonds, and ionic bonds. Be very specific and make sure your descriptions use information which is related to the material covered and not just stuff you already knew! 2. Explain why CO2 has a dipole moment of zero while OCS has a dipole moment of 0.715 3. Why does Cesium form a cation while chlorine forms an anion? Explain the behavior of each of these elements based on all you know about the atomic structure and properties of these elements Explain why having a polar bond in a molecule is not enough on its own to make the molecule polar. What else must the molecule have and why? 4. What is the relationship between core charge, atomic size, IE, AVEE and metallic character for Mg and P. Thoroughly explain 5. 6. Draw the Lewis structures for CO and CO2. Explain the differences in these 2 C to O bonds in terms of number of electrons shared, the bond orders, the bond energy or strength of these bonds, and the polarity of the molecules Explain the differences and similarities between formal charges and partial charges, including for what each is used, the advantage or disadvantage of each, and how the two are related. 7. Give an example of how 8. Describe what is meant by the term "electronegativity electronegativity varies in a systematic way in terms of the periodic table, and provide an explanation of that trend in terms of atomic structure bonding in MgF2(s), Zn(s), and H2O differ. Don't just name the different types of bonding-describe how they are different and what similarnties there are. 9. Using grammatically correct English sentences, describe how the nature of theExplanation / Answer
serial no Polar covalent bond Nonpolar covalent bond Ionic bond 1. Results when when a pair of electrons are is unequally shared between two atoms. Results when a pair of electrons equally shared betwwen two atoms. Results when electrons completely transferred form one atom to another atom. 2. Attraction force is towards the more electronegetive atom. Such bond lack of such direction in attraction force. Attractive forces are nondirectional. The attractive forces extends throughout the lattice. 3. Polar covalent bonds have a partial positive and negetive charges. Non polar covalent lack of charges. Ionic bond has positive and negetive charges 4. Bond strength is more than non-polar covalent bonds Bond strength is least. Boind strength is higher than covalent bonds. 5. Poalr covalent bonds shows isomerism Does not show Isomerism Does not Isomerism 6. Covalent compounds with polar bonds ionises in aqueous solution. compunds consists of non-polar covalent bonds do not ionises in aqueous soultion Compunds having ionic bonds dissociates into ions in aqueous solution. 7. Do not show isomorphism Do not show isomorphism. Shows Isomorphism. i.e. forms ionic compounds with similarity internal lattice structure 8. Harder than nonpolar covalent bonds. Softer and flexible. Ionic bonds are Hard but brittle