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Can you finish secret agent beakers task to save your planet?. There are rules for naming!!. When Metals combine with non metals Metal loose one or more electron (becomes cation Ex: Mg2 +) Non metal gains one or more electrons (becomes anion Cl - ) These are called binary compounds
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Can you finish secret agent beakers task to save your planet?
When Metals combine with non metals • Metal loose one or more electron (becomes cation Ex: Mg2+) • Non metal gains one or more electrons (becomes anion Cl-) • These are called binary compounds • Cations are always named first • Anions are always second
Rules for naming Type 1 ionic Compounds • Cation always named first, Anion named second • The cation takes the name of the element • Ex Na+ Sodium • The anion takes the root of the element and is followed by a –ide • Ex Cl- Chloride • When they form a compound they are Sodium Chloride • Ex NaI Sodium Iodide, CaO calcium Oxide
Rules for naming Type 2 Binary Compounds • When metals form more than one ion there are different rules(Transition Metals) • Ex Pb forms Pb2+ and Pb4+ • We must distinguish what type of Lead we are talking about • Scientists use a roman numeral to distinguish what type of a metal is being used
You must determine the type of metal by seeing how the ions combined • How could you determine the type of lead in PbO2? • It must be Pb(IV) because O always forms O 2- • Thus PbO2 is called Lead(IV)Oxide
Name the following • PbBr2 • PbBr4 • LiCl • MgO Lead(II)Bromide Lead(IV)Bromide Lithium Chloride Magnesium Oxide
Polyatomic Ions • Polyatomic ions are ions that are composed of more than one element • Ex- OH-= Hydroxide has a charge of -1 • NH4+ = Ammonium has a charge of +1 • SO42-= Sulfate and has a charge of -2 • You must memorize, Hydroxide, Ammonium, Sulfate, Nitrate, Carbonate and acetate
There are rules for naming these as well • YOU MUST LEARN TO RECOGNIZE POLYATOMIC IONS • Similar to rules for naming binary ionic compounds • Ex: NaOH= Sodium Hydroxide • Must distinguish what type of metal it contains • Ex Fe(NO3)3 = Iron(III)Nitrate • You must put the Polyatomic in parenthesis when writing more than one polyatomic • You must memorize Hydroxide, Ammonium, Sulfate, Nitrate, Carbonate and acetate
Binary Compounds that contain non metals • There are different rules when a compounds contains only nonmetals • Ex: B,C,N,O,F, • The first element in the formula is named first,and the full element name is used • The second element is named as though it were an anion • Prefixes are used to tell the number of atoms present
Prefixes are • Mono-1 • Di-2 • Tri-3 • Tetra-4 • Penta-5 • Hexa-6 • Hepta-7 • Octa- 8 • Note, mono is not used when describing the first atom
Ex: • CO2 • Name is carbon dioxide • N3O5 • Name is trinitrogenpentoxide • PCl3 • Name is phosphorous trichloride
Try These • I2O7, CF4,IF5 • diiodineheptoxide, carbon tetrafluoride, iodine pentafluoride
Name the following • Cu(NO3)2, PbCO3, NH4I NaCN • copper(II) nitrate, lead(II) carbonate, ammonium iodide, sodium cyanide
Name the following • BF3, NaCl, CCl4, FeS, AlBr3,N2O5, CuCl Na2SO4, KI boron trifluoride, sodium chloride, carbon tetrachloride, iron(II) sulfide, aluminum bromide dinitrogenpentoxide,, copper(I)chloride, sodium sulfate, potassium Iodide