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CSU CHEM 111 - Exam 1 study guide

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CHEM 111 1st EditionExam # 1 Study GuideCh. 1I. Types of matterA. Pure substances are only one type of matter, cant be separated into simper substances by physical processesB. Mixtures are combinations of two or more pure substances that can be separatedi. homogeneous: vinegarii. heterogeneous: salad dressingII. Intensive PropertiesA. independent of the amount of substance presentB. examples would be color, melting point, densityIII. Extensive properties A. varies with the amount of the substance presentB. examples would be volume and massIV. Physical propertiesA. can be observed without changing it into another substanceB. Examples would be luster hardness, solubilityV. Chemical PropertiesA. Can be observed only by reacting it to form another substanceB. Examples would be flammability and a car rustingCh. 2I. The nucleusA. Atoms and protonsB. Positively charged centerII. Atomic mass unit(amu)- relative masses of unitsIII. Mass numberA. 1 amu for protons and neutrons, 0 for electronsIV. Isotopes- element containing different # of neutrons V. The periodic tableA. Horizontal rows are periodsB. Columns are groupsC. Molecular mass can be found on bottom of Atomic symbolVI. The moleA. Avagadros number= 6.022*10^23 particles/moleCH. 3I. Wave propertiesThese 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.A. wavelength (λ) always in metersB. frequency(v) always in Hertz or 1/sC. C is the constant of the speed of light in a vacuumD. Energy(E) always in julesE. h is a constant F. λV=cG. E=hc/λH. E=hvI. As wavelength goes up, frequency and energy go down and vice versaJ. Rydburg Equation:A. Where R is a constant and nf2 is the final energy level and ni2 is the initial energy level. K. Bohrs modeli. accurately predicts energy needed to remove an electron from an atom(ionization)L. De Broglies Equation for wavelengthi. λ=hc/E=hc/mc^2=h/mc=h/mvii. λ is The De Brogliewavelength, m=mass in kg of an electron, v=velocity in m/s, and h is planks


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