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Naming Molecular Compounds

This worksheet teaches students how to name molecular compounds using prefixes and formulas. It emphasizes the importance of precise chemical naming and explores covalent bonding between nonmetals through examples like CO and CO₂.

Daniel Miller
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NamingMolecularCompoundsHow are the chemical formula and name of a molecular compound related?Why?When you began chemistry class this year, you probably already knew that thechemical formula for carbon dioxide was COa. Today you will find out why COaisnamed that way. Naming chemical compounds correctly is of paramountimportance. The slight diflerence between the names carbon monoxide (CO, apoisonous, deadly gas) and carbon dioxide (COa, a greenhouse gas that weexhale when we breathe out) can be the diflerence between life and deaths Inthis activity you wTill learn the naming system for molecular compounds.M o d e l 1 - M o l e c u l a r C o m p o u n d sMolecularFormulaNumber ofAtomsof FiretElementNumber ofAtoms ofSecondElementName of CompoundC1F11Chlorine monofluorideC1FE15Chlorine pentafluorideCO11Carbon monoxidecoa15Carbon dioxideCLO21Dichlorine monoxidePCL15Phosphorus pentachlrorideNaOs25Dinitrogen pentoxide1. Fill in the table to indicate the number of atoms of each type in the molecular formula.2. Examine the molecular formulas given in Model 1 for various molecular compounds.a. Haw many different elements are present in each compound shown?twob. Do the compounds combine metals with metals, metals with nonmetals, or nonmetals withnonmetals?Non-metals with non-metalsc.Based on your answer to b, what type of bonding must be involved in molecularcompounds?Covalent bonds3.Find all of the compounds in Model 1 that have chlorine and fluorine in them. Explain why thename "chlorine fluoride1' is not sufficient to identify a specific compound.Mlewrrm!*::±ji12Xa:r*£«Naming Molecular CompoundsriHiLT’writ>il eo i ctwge o nQstudocuDownloaded by Anthony Ngatia {tDnyrgatziggmai.Kjni)

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4. Assuming that the name of the compound gives a clue to its molecularformula, predict how many atoms each of these prefixes indicates, andprovide two examples. Mono- onedi- twopenta- fiveM o d e l 2 - Preffixes a n d SuffixesPrefii xNumericalValueMolecularFormulaName o f Compoundmono-1BCleBoron trichloridedi-2SFeSulfur hexafluoridetri-3IF?Iodine heptafluoridetetra-4N LNitrogen triiodidepenta-5NsOtDinitrogen tetroxidehexa-6C LXODichlorine monoxidehepta-7PiOioTetraphosphorusdecoxideocta-8BaHsPenta boron nonahydridenona-gBia CfeTribroniine octoxidedeca-1 0C1FChlorine monofluoride5. Examine die prefi xes in Model 2. Fill in the numerical v a ue diat corresponds to each prefix.6. What suffl x (ending) d o all the compound names in Model2have in common? -ide7. Carefully examine the names of the compounds in Model 2. When is a prefix N O T used in front ofdie name of a n element? A prefix is not used when there is only ONE atom of the first element8.Consider the compound NO.a.Which element, nitrogen or oxygen, would require a prefix in the molecule name?Explain your answer.Oxygen It is the second element in the compound. The elements arecovalendy bonded so a prefix is needed to shew how many atoms of the element are in themoleculePOGIL’ Activities for High School Chemistry72nrtwjnlnarlpd h v Anfhnnw N n a t w ftnnwn nalrtfllnmail m m l
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