affinity), electrostatic attraction holds the compound together 2. Covalent Compounds a. Nonmetal with nonmetal, electrons are held somewhere in between and the electron attractions holds the atoms together 3. Organic Compounds a. Carbon containing compounds, excludes carbon oxides 4. Acids/Bases a. Compounds that contain an H+ they can give away, donate or accept protons 5. Compounds with common names a. Water(H2O), ammonia(NH4), ozone(O3) Writing Ionic Formulas: Metals tend to lose one or more electrons to form positive ions, while nonmetals gain one or more electrons to form negative ions(high electron affinity) Symbol of cation/metal is given first in formula Binary Ionic Compound: min number of each ion when combined will provide each numbers of positive and negative electrical charges (a neutral formula unit) Example: Aluminum and Oxygen: Al 2 O 3 Naming Binary Ionic Compounds: 1. Cation named first, anion second 2. Cation takes name from name of parent element 3. Anion takes second, and then take the root of the element name and add -ide(oxide)
4. No prefixes are used 5. DONT WRITE WITH CAPITAL LETTERS Compounds with More than One Oxidation State: 1. Transition metals cations usually require a roman numeral→ indicates charge of metal cation Example: CuBr → copper(I) bromide FeS → iron(II) sulfide PbO 2 → lead(IV) oxide Polyatomic Ions: CuSO4 copper (II) sulfate KSCN potassium thiocyanate NH4No3 ammonium nitrate
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