Quiz+11+Answer+Key - Quiz#11 GSI Andrea Geyer Please show...

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Quiz #11 Chem 130 Sec 208 GSI: Andrea Geyer Please show all work or no credit will be given Name:______________________ 1) What model most accurately represents HCN (Circle the appropriate structure)? 2) What is the difference between a coordinate covalent bond and a covalent bond? In a covalent bond electrons that are shared come from both atoms whereas in a coordinate covalent bond the electrons that are shard come entirely from one atom. 3) Ar, K + , and Ca 2+ are ___isoelectronic_________. 4) Mg 2+ will have a larger radius than Mg. True False Mg 2+ will have two less electrons than Mg, making it smaller. 5) What is the bond order of BF 3 ? Electrons Available = 3 + 7(3) = 24 Electrons Needed = 6 + 3(8) = 30 recall that B can break the octet rule # of bonds = (30-24)/2 = 3 bonds
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Unformatted text preview: Bond Order = 3 H C N H N C H C N H C N-1-1 Quiz #11 Chem 130 Sec 109 GSI: Andrea Geyer Please show all work or no credit will be given Name:______________________ 1) CO 3 2-consists of three a) resonance structures b) isomers 2) Be is larger than Be + . True False Be + will have one less electron than Be. This makes it smaller than Be. 3) What is the bond order of TeO 2 ? Show all work including a lewis structure. Electrons Available: 3(6) = 18 Electrons Needed: 3(8) = 24 Bonds: (24-18)/3 = 3 Bond Order = (number of bonds) / (number of positions for bonds) = 3/2 = 1.5 4) What are the formal charges on each of the atoms in the following molecule: This molecule has an overall charge of -2....
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