Whats in a name? When two people use different names for the same thing, misunderstood words are apt to happen. The British and Americans often get confused.

Find the bonnet. Find the boot.

Which is the chemist and which is the pharmacist?

Which is plaster and which is a band-aid?

Nomenclature A System of Naming Compounds Compounds are two or more atoms of different elements bonded together. Even though the gases O 2, N 2, F 2, and Cl 2 travel in pairs, their names are simply oxygen, nitrogen, fluorine, and chlorine.

METALS vs. Non-METALS

F 2 & Cl 2 (Fluorine & chlorine gas) HF (g) Hydrogen Fluoride HCl (g) Hydrogen Chloride H 2 S Dihydrogen Sulfide HCN – Hydrogen cyanide NO - NO 2 - NO 3 - N 2 O Cl 2 O dichlorine monoxide NH 3 Ammonia PCl 3 Phosphorus trichloride

Theory Compounds are composed of two or more elements chemically combined. An alternative way to describe a compound is that they contain two or more different kinds of atoms. Binary compounds contain only two types of atoms. The names of all binary compounds always end in -ide. If a binary compound contain two different non-metallic elements, then prefixes are used to indicate the number of atoms. The stock system is used to name binary compounds that contain a metal and a non-metal. The next lesson will deal with the stock system.binary compoundsnon-metallic elements

mono- 1 hepta- 7 di- 2 octa- 8 tri- 3 nona- 9 tetra- 4 deca- 10 penta- 5 undeca- 11 hexa- 6 dodeca- 12 In order to be effective in using prefixes to name compounds containing two non-metals, these prefixes must be committed to memory:

When naming compounds using prefixes remember the formulas are written just like the names and the names just like the formulas. The only difference is that the prefixes in the name are written as subscripts in the formula. Also remember that when there is only one of the first atom a prefix is not used.

Example #1- Names to Formulas Sulfur trioxide S O 1 3 Im a Binary Compound 2. Write number of atoms 1. Write symbols of elements Final Formula If no prefix, then 1 is implied and not written

Example #2- Names to Formulas dichlorine heptaoxide Cl O 2 7 Im a Binary Compound 2. Write number of atoms 1. Write symbols of elements Final Formula

Example #3- Names to Formulas oxygen difluoride O F 1 2 Im a Binary Compound 2. Write number of atoms 1. Write symbols of elements Final Formula If no prefix, then 1 is implied and not written

Example #4- Names to Formulas dinitrogen tetraoxide N O 2 4 Im a Binary Compound 2. Write number of atoms 1. Write symbols of elements Final Formula

Example #5- Names to Formulas phosphorus pentachloride P Cl 1 5 Im a Binary Compound 2. Write number of atoms 1. Write symbols of elements Final Formula If no prefix, then 1 is implied and not written

Example #6- Names to Formulas di nitrogen monoxide N O 2 1 Im a Binary Compound 2. Write number of atoms 1. Write symbols of elements Final Formula If no prefix, then 1 is implied and not written

Example #7- Names to Formulas carbon monoxide C O 1 1 Im a Binary Compound 2. Write number of atoms 1. Write symbols of elements Final Formula If no prefix, then 1 is implied and not written

Example #8- Names to Formulas sulfur hexafluoride S F 1 6 Im a Binary Compound 2. Write number of atoms 1. Write symbols of elements Final Formula If no prefix, then 1 is implied and not written

Example #10- Names to Formulas dinitrogen trisulfide N S 2 3 Im a Binary Compound 2. Write number of atoms 1. Write symbols of elements Final Formula

Examples #1- Formulas to Names CCl 4 carbonmonotetra Im a Binary Compound 2. Write number of atoms 1. Write names of elements Final Name chlor ine ide If first prefix is mono, it is implied and not written

Examples #2- Formulas to Names XeF 3 xenonmono tri Im a Binary Compound 2. Write number of atoms 1. Write names of elements Final Name fluor ine ide If first prefix is mono, it is implied and not written

Examples #4- Formulas to Names AsI 3 arsenicmono tri Im a Binary Compound 2. Write number of atoms 1. Write names of elements Final Name iod ine ide If first prefix is mono, it is implied and not written

Examples #6- Formulas to Names IF 5 iodinemono penta Im a Binary Compound 2. Write number of atoms 1. Write names of elements Final Name fluor ine ide If first prefix is mono, it is implied and not written

Examples #8- Formulas to Names N2S5N2S5 nitrogen di penta Im a Binary Compound 2. Write number of atoms 1. Write names of elements Final Name sulf ur ide

Examples #9- Formulas to Names SiCl 4 siliconmono tetra Im a Binary Compound 2. Write number of atoms 1. Write names of elements Final Name chlor ine ide If first prefix is mono, it is implied and not written

Practice Problem #1 ClF 3 Choose the correct name for the compound 1. carbon iodine trifluoride 2. chlorine trifluorine 3. chlorine trifluoride 4. chlorine tetrafluoride 5. none of the above next problem PrefixesElement List

Practice Problem #2 arsenic pentabromide Choose the correct formula for the compound 1. AsBr 5 2. ArBr 5 3. AsBr 7 4. As 5 Br 5. none of the above next problem PrefixesElement List

Practice Problem #3 N2O3N2O3 Choose the correct name for the compound 1. nitrogen trioxide 2. dinitride trioxide 3. dinitrogen trioxygen 4. dinitrogen trioxide 5. none of the above next problem Prefixes

Practice Problem #6 dichlorine monoxide Choose the correct formula for the compound 1. ClO 2. Cl 2 O 3. ClO 2 4. Cl 2 O 2 5. none of the above next problem Prefixes

Practice Problem #8 Tetraphosphorus decaoxide Choose the correct formula for the compound 1. P 4 O P 6 O PO P 2 O 5 5. none of the above next problem Prefixes

Practice Problem #11 NO Choose the correct name for the compound 1. mononitrogen monoxide 2. nitrogen monoxygen 3. mononitrogen oxide 4. nitride monoxide 5. none of the above next problem This is nitrogen monoxide

Practice Problem #16 silicon tetrabromide Choose the correct formula for the compound 1. SBr 4 2. ScBr 4 3. SiB 4 4. SiBr 6 5. none of the above next problem PrefixesElement List The correct formula is SiBr 4

Practice Problem #17 S4N4S4N4 Choose the correct name for the compound 1 tetrasulfur tetranitride 2. tetrasulfur nitride 3. trisulfur trinitride 4. tetrasulfur tetranitrogen 5. none of the above next problem Prefixes

Practice Problem #19 BF 3 Choose the correct name for the compound 1. monoboron trifluoride 2. boron trifluorine 3. boron trifluoride 4. bromine trifluoride 5. none of the above Element List

Practice Problem #20 tetraphosphorus decasulfide Choose the correct formula for the compound 1. P 6 S 9 2. P 4 S 9 3. P 4 Si Ph 4 S none of the above next problem PrefixesElement List The correct formula is P 4 S 10

Si As Al Ge Sb Po B Te At H H dual properties

Element List 1 Actinium Ac 2 Aluminum Al 4 Argon Ar 5 Arsenic As 6 Astatine At 7 Barium Ba 9 Beryllium Be 10 Bismuth Bi 12 Boron B 13 Bromine Br 14 Cadmium Cd 15 Calcium Ca 17 Carbon C 18 Cerium Ce 19 Cesium Cs 20 Chlorine Cl 21 Chromium Cr 22 Cobalt Co 23 Copper Cu return 24 Fluorine F Francium Fr 24 Gallium Ga Germanium Ge Gold Au Helium He Hygrogen H Indium In Iodine I Iridium Ir Iron Fe Krypton Kr 47Lanthanum La 48Lead Pb 49Lithium Li 50Magnesium Mg 51Manganese Mn 52Mercury Hg 53Molybddenum Mo 54Neon Ne 55Nickel Ni 56Niobium Nb 57Nitrogen N 58Osmium Os 59Oxygen O 60Palladium Pd 61Phosphorus P 62Platinum Pt 70Plutonium Pu 71Polonium Po 72Potassium K 73Radium Ra 74Radon Rn

Prefixes mono- 1 hepta- 7 di- 2 octa- 8 tri- 3 nona- 9 tetra- 4deca- 10 penta- 5 undeca- 11 hexa- 6dodeca- 12 return