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Published byTodd Wilkins Modified over 10 years ago
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Nomenclature System of naming compounds
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Molecular Nomenclature Naming covalent compounds Based on a system of prefixes
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One mono-sixhexa- Twodi-sevenhepta- Threetri-eightocta- Fourtetra-ninenona- Fivepenta-tendeca-
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Examples of Molecular Names CO 2 CO P 2 O 5 CCl 4
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Ion Formed when electrons are added or removed from an atom Gain electrons – become negative - Anion Lose electrons – become positive - Cation
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Why Form Ions Atoms gain or lose electrons to end up with the same number of electrons as the nearest noble gas Predict the charges expected by O Ba
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Ion Generalizations Metals generally form + charges, while non- metals form – charges Ionic compounds tend to be composed of a metal combined with a non-metal Molecular compounds usually are two non- metals
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Polyatomic Ions Atoms joined in a molecule but have a net charge – (SO 4 ) 2- – NO 3 -
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Finding Formulas from Names Calcium nitrate Copper (I) carbonate
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Names from Formulas AlCl 3 K(NO 3 ) Al 2 O 3 Fe 3 (PO 4 ) 2
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Acid Names Acids all start with an H For binary acids (H and one other element), start with prefix hydro- and end with suffix –ic
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Oxyacids H, O and another element If anion has an –ate ending, give acid an –ic ending If anion has an –ite ending, give acid an –ous ending
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