Unit 2 - Topic 6 Review PDF

Chemical Compounds Formulas and Compounds: There are 112 elements which can be combined together to form compounds. Compounds - when elements combine together. They are held together through chemical bonds. Chemical bonds - are formed when elements gain, lose or share electrons....

Chemical Compounds Formulas and Compounds: There are 112 elements which can be combined together to form compounds. Compounds - when elements combine together. They are held together through chemical bonds. Chemical bonds - are formed when elements gain, lose or share electrons. Ionic Compound - if atoms transfer electrons to other atoms. Molecular Compound - if atoms share electrons.  Chemical Form ulas - uses symbols and numerals to represen t the composition of a pure substance. ◦Law of De nite composition - every pure substance has only one composition. So water H2O is always H2O wherever it is found. Molecular Compounds Molecule - the smallest unit of. Pure substance which is usually a bunch of atoms joined together. Diatomic Molecules - molecules made of atoms of the same element. For example, Oxygen is two molecules like in O2. Attraction between atoms is strong, attraction between molecules is weak allowing us to melt or vaporize compounds using enough energy (heat) to break the attraction between molecules. Think of melting or boiling molecular compounds. Naming Elements: Binary Compound - a compound made from two elements. Naming Molecular Binary Compounds: Ionic Compounds Ion - when an atom gains or loses electrons. An atom becomes an Ion (which is just an atom with a positive or negative charge) when it loses or gains an electron. Most atoms have an equal number of protons (positive) and electrons (negative). Example: When chlorine atoms combine with sodium atoms, the chlorine give one electron to the sodium. The chlorine now has less electrons than protons (making it positive) and the sodium has more electrons than protons (making it positive). Conductivity - the ability of a substance to carry an electric current. When an ionic compound is dissolved in water, then it seperates into positive and negative charges particles, which is what electricity needs to travel (conducts). How Are Ionic Compounds Named  Ionic & Covalent Compounds Worksheet Write formulas for the following compounds and classify as ionic (I) or covalent (C): lithium chloride I or C ammonium permanganate silver nitrate zinc hydroxide carbon disulfide iron(III) phosphate copper(I) iodide tin(IV) fluoride barium dichromate beryllium nitrite sulfur trioxide calcium bromide lead(IV) carbonate carbon tetrafluoride strontium sulfide aluminum acetate sodium bicarbonate tin(II) iodide boron trichloride dibromine pentoxide ammonia silicon dioxide tetrasulfur tetranitride magnesium phosphide copper(I) bisulfite Write names for the following compounds and classify as ionic (I) or covalent (C): NaClO4 I or C P2O3 Li3P KHSO4 FeS PbCrO4 MgBr2 ZnSO4 K2CO3 Cl2S5 H2O Al2O3 NF3 CO2 NH4NO2 Cu(NO3)2 Ca3N2 AlPO4 Na2SO3 CCl4 KCN HCl strong acidI CH4 Ba(OH)2 H2S LiC2H3O2 lithium chloride LiCl I ammonium permanganate NH4MnO4 I silver nitrate AgNO3 I zinc hydroxide Zn(OH)2 I carbon disulfide CS2 C iron(III) phosphate FePO4 (also called ferric phosphate) I copper(I) iodide CuI (also called cuprous iodide) I tin(IV) fluoride SnF4 (also called stannic fluoride) I barium dichromate BaCr2O7 I beryllium nitrite Be(NO2)2 I sulfur trioxide SO3 C calcium bromide CaBr2 I lead(IV) carbonate Pb(CO3)2 (also called plumbic carbonate) I carbon tetrafluoride CF4 C strontium sulfide SrS I aluminum acetate Al(C2H3O2)3 I sodium bicarbonate NaHCO3 I tin(II) iodide SnI2 (also called stannous iodide) I boron trichloride BCl3 C dibromine pentoxide Br2O5 C ammonia NH3 C silicon dioxide SiO2 C tetrasulfur tetranitride S4N4 C magnesium phosphide Mg3P2 I copper(I) bisulfite CuHSO3 (also called cuprous bisulfate) I NaClO4 sodium perchlorate I P2O3 diphosphorus trioxide C Li3P lithium phosphide I KHSO4 potassium bisulfate I FeS iron(II) sulfide or ferrous sulfide I PbCrO4 lead(II) chromate or plumbous chromate I MgBr2 magnesium bromide I ZnSO4 zinc sulfate I K2CO3 potassium carbonate I Cl2S5 dichlorine pentasulfide C H2O water C Al2O3 aluminum oxide I NF3 nitrogen trifluoride C CO2 carbon dioxide C NH4NO2 ammonium nitrite I Cu(NO3)2 copper(II) nitrate or cupric nitrate I Ca3N2 calcium nitride I AlPO4 aluminum phosphate I Na2SO3 sodium sulfite I CCl4 carbon tetrachloride C KCN potassium cyanide I HCl hydrogen choride or hydrochloric acid if (aq) strong acidI CH4 methane C Ba(OH)2 barium hydroxide I H2S (di)hydrogen sulfide C LiC2H3O2 lithium acetate I