1. What is the most important attractive forces present in each of these solids: a.) HCN (hydrocyanic acid) b.) CHCl3 (chloroform) c.) P4 (phosphorus) d.) BF3 (boron trifluoride) e.) C2H6 (benzene) f.) (Carbon dioxide) g.) BaSO4 (barium sulfate) h.) CH2O (formaldehyde) i.) H2O (water) j.) Xe (xenon) Is it Ionic Bonding, Dipole-dipole interaction, London Dispersion Forces, Hydrogen Bonding

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Q: Relative Intensity 100 60 40 8 / Find out the functional group 10 20 50 40 50 60 70 1860 my 2000 Wer

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Q: What is the formal charge of O in the molecule below? O a. +1 O b.-1 O c. +2 O d.o :CO:

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Q: Which isotonic has largest radius?

A: Which isoelectronic has largest radius?

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Crystal Structures

Solids are present all around us. They have different properties and applications. Diamond and graphite are two well-known solids. Diamond is the hardest material in the world and is used in making jewelry. Graphite on the other hand is soft. The lead of your pencil is graphite. Why are they so different in appearance and properties despite the fact they are chemically the same? Both are allotropes of carbon. The answer lies in the structure, the way constituent particles are arranged in the solids.