Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Nomenclature Notes Nonmetal-Nonmetal Compounds Naming Compounds Step 1: Look up the names of the elements on the periodic table by using the symbols given in the formula. Step 2: Use prefixes when naming a nonmetal-nonmetal compound. The number following the symbol indicates the prefix to use. *The prefixes used in compounds containing two nonmetals are: 1 mono6 hexa2 di7 hepta3 tri8 octa4 tetra9 nona5 penta10 decaStep 3: Modify the second elements’ ending to –ide. Exception 1: Only use the prefix mono- on the second element, if there is only one atom of the second element. Examples: Cl2O – dichlorine monoxide BCl2 - boron dichloride Exception 2: If the prefix ends with an “a” or an “o” and the element starts with an “a” or “o”, drop the “a” or “o” off the prefix. Examples: O6 – hexoxide, NOT hexaoxide O – monoxide, NOT monooxide Writing Formulas Step 1: Use the periodic table to identify the symbols of the elements (note that the second elements’ ending is –ide meaning, for example, that bromide is actually bromine). Step 2: Determine what number the prefix stands for and write this number as a subscript after the symbol. The number one (1) is not written in a formula. If no subscript follows an element symbol, than it is understood to be a one (1). Practice Problem Examples “Binary Nomenclature Worksheet – Part A” 1) CO C = carbon O = oxygen -no numbers follow the symbols so it’s understood that there is one of each element -the prefix for one is mono-the prefix for one is only used on the second element Answer: carbon monoxide 2) CO2 C = carbon O = oxygen 1 = mono 2 = di Answer: carbon dioxide “Binary Nomenclature Worksheet – Part B” 1) disilicon hexabromide di is the prefix for “2” hexa is the prefix for “6” silicon is “Si” bromide is bromine, “Br” Answer: Si2Br6 2) chlorine dioxide no prefix means “1” chlorine is “Cl” Answer: ClO2 di is the prefix for “2” oxide is oxygen, “O” BrassbridgeChemistry/UnitTwo/NotesNomNMNM