Chem 115 1st Edition Lecture 4Outline of Last LectureI. ErrorsII. ElementsIII. LawsIV. Dalton’s Atomic TheoryV. ExperimentsVI. Atomic PictureOutline of Current LectureI. BondingII. IonsIII. Chemical FormulaIV. Empirical FormulaCurrent LectureMetal & Non-metal = Ionic BondNon-metal & Non-metal = Covalent BondIonic: transfer electrons (has charges)Covalent: sharing electronsIon: a single atom or covalently bonded group of atoms that has an overall electrical charge- No molecules in an ionic compound- Most covalent substances consist of moleculesH2P4N2S8O2Cl2F2Br2These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute. Special circumstances of ions*memorize*I2Se8Polyatomic Ion: consists of two or more atoms covalently bonded together and has an overall charge- Will remain together as a unitChemical Formula: indicates type and number of each atom present in the smallest unit of a substance- Cation comes first then anion- Binary Ionic Compound: both anion and cation are monatomic- Name of cation is the same as the name of the metal- Name of anion is the root of the non-metal with –ideEmpirical Formula: simplest ratio for a chemical formulaEx. Mg+2 N-3=
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