Chemistry 121 Exam One Study Guide
Chemistry 121 Exam One Study Guide CHEM 121
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This 4 page Study Guide was uploaded by Erin Swanson on Thursday February 4, 2016. The Study Guide belongs to CHEM 121 at University of North Dakota taught by Shaina Mattingly in Winter 2016. Since its upload, it has received 96 views. For similar materials see General chemistry in Chemistry at University of North Dakota.
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Date Created: 02/04/16
February 04, 2016 Chemistry 212 Exam 1 Study Guide *Remember that on the first page of the test you are given all the equations you will need, as well as a periodic table* Chapter 0: -Know how to convert things into scientific notation -Remember significant figures -Know how to convert degrees Celsius into Kelvin -Remember how to solve density and energy problems Chapter 1: -Know how to find elements on the Periodic Table (period/group) -Know which elements are metals, nonmetals, and semimetals -Be able to tell the difference between physical and chemical properties -Be able to tell whether these properties are intensive or extensive -Know which elements are alkali metals, alkaline earth metals, halogens, and noble gases and know basic characteristics of each -Remember the Law of Conservation of Matter as well as the Law of Definite Proportions -Know how to find the atomic number, mass number, and atomic weight -Know what an isotope is and how to do isotope notation -Know how to do conversion factors (length, weight, molar mass, etc.) Chapter 2: -Know what wavelength and frequency are and how to calculate both -Remember the speed of light -Remember that blue light has higher frequency and shorter wavelengths and that red light is the opposite -Know what a photon is -Know what work function is -Know what each quantum number represents and how to find it (n, l, m) l -Remember the orbitals (s, p, d) -Know the Pauli Exclusion Principle and the Aufbau Principle -Know how to do an electron configuration as well as the short hand (noble gas) version -Know the characteristics of atomic radii as you go across the periodic table -Know how to calculate valence electrons as well as the Zeffharge PRACTICE PROBLEMS: Scientific Notation: -4 38,000= 2.3*10 = 0.0000046= 8.2*10 = 2,600= 1.75*10 = Measuring Temperature: 113C= 15K= 20C= 460K= 37C= 100K= Density Problems: 3 What is the density with a mass of 25.0g and a volume of 29.4cm ? 500.0g of sugar occupies a volume of 315mL, what is the density? Counting Significant figures: 0.000000025= 260= 500.25= Conversions: How many g are in 0.013kg? How many meters are in 450 mm? Salt has a density of 2.16 g/mL. If you use 2.00mL on food, what mass would you use? Isotopes: How many protons, neutrons, and electrons does the isotope Se have if the atomic mass is 75? Cu has two isotopes, Cu-63 (69.15%, 62.93) and Cu-65 (30.85%, 64.93) what is the atomic weight of Cu? Atomic Conversions: How many atoms are in 32.066g of Sulfur? How many moles are in 11.51g Ti? How many grams are in 1.505 moles of Ti? Wavelength & Frequency: What is the frequency of a radar wave with a wavelength of 10.3cm? 21 What is the mass of 4.89*10 atoms F? Work Function: Work function= 350kJ/mole. Will photons of violet light with a wavelength of 390nm cause electrons to be ejected from Zn? What energy does a mole of photons with a wavelength of 750nm have? Electron Configuration: Carbon= Iron= Shorthand (Noble Gas) Configuration: Sodium= Cobalt= How many unpaired electrons does Iron have? How many valence electrons does Magnesium have?
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