1st Sem Review Questions PDF

Office Hours Practice Write the isotope symbol for Uranium-290 How many protons, neutrons, and electrons does it have? Write the equation for the beta decay of this isotope. Office Hours Practice What is the energy of a photon with a wavelength of 4.5 x 103 m? If the wavelength was longer...

Office Hours Practice Write the isotope symbol for Uranium-290 How many protons, neutrons, and electrons does it have? Write the equation for the beta decay of this isotope. Office Hours Practice What is the energy of a photon with a wavelength of 4.5 x 103 m? If the wavelength was longer in another photon, would its energy be higher or lower? Office Hours Practice Find the percent composition of carbon in glucose, C6H12O6. Write and balance the combustion reaction of glucose. How many moles of carbon dioxide is produced if 5.00g of glucose is combusted?  Warm Up What is the complete and shorthand electron configuration of selenium? Find the formula of nickel (II) nitrate. Does nickel have a higher or lower ionization energy than selenium? Explain. Chemistry Final Review Density What is the mass of a sample of material that 3 has a volume of 55.1 cm and a density of 6.72 g/cm3?  Conversions 1. Convert 55.0 mL to liters 2. 25 cm to kilometers Matter characteristics of a solid include (fixed/variable) volume and shape. Particles that make up solids are held (loosely/tightly)in a (flexible/rigid) structure, so the particles can (vibrate only slowly/ flow past each other). How about Liquids and gases? The Atom The number of protons in one atom of an element determines the atom’s identity , and the number of electrons determines of an charge element. The massof an element is the total number of protons and neutrons in the nucleus of the atom. Use: -mass -protons -neutrons -electrons -charge -identity -nucleus Isotope Symbol Give the isotope symbol and number of protons, neutrons, and electrons in one atom of Barium-138 Nuclear Chemistry Complete each equation and name the type of decay: Beta Alpha List the 3 types of radiation (α, β, γ) in order from least penetrating to most penetrating. Rxn 1🡪 Fusion Rxn 2 🡪 Fission Chemical reactions hydrogen + oxygen + heat → water Which are products? Reactants? Write and balance the chemical equation. ∆ 2H2 + O2 → 2H2O  Mark the following as a Physical Change or a Chemical Change C C P P Label each as a compound, element, homogeneous, or heterogeneous mixture He E C Ho Electron configuration Write both the electron configuration and shorthand (noble gas notation) for Copper, Cu 1s2 2s2 2p6 3s2 3p6 4s2 3d9 [Ar] 4s2 3d9 Periodic Table Which atom would have the greatest electronegativity? a. Li b. Fr c. F d. At What is the difference between electronegativity and ionization energy? Explain why the trend increases this direction. Arrange the elements in a list with an increasing radius Cs, O, Li --Which group of elements would have the most similar properties? Al, Si, P or Al, Ga, In --The most reactive metals are found in group? a. 1 b. 2 c. 17 d. 18 What charge ion do they form? --Which periodic table group number has a full octet? a. 1 b. 2 c. 17 d. 18 Atoms and moles How many atoms of iron are in Fe2O3? 15 Find the grams of 2.35 x 10 atoms of Zn. Bonding: anion cation ion Any charged atom or molecule is called an _____________ ion and it will either have a + charge and be called a ________________ cation or it will have a – charge and be called an _____________. anion Typically, metals make _________ cations and nonmetals make __________ anions  Bonding: compare the types Ionic Bonds Covalent bonds _________ transfer electrons share _________ electrons nonmetal Forms betweennonmetal metal and ____ Forms between______ nonmetal ______ and ____ Physical properties include: Physical properties include: High melting points Often flammable Biological molecules Conducts electricity when melted Dissociates in water Doesn’t conduct electricity  Metallic Bonding Explain what this model Represents and how metals bond.  Naming Ionic/Covalent/Metallic Decide if each is ionic, covalent or metallic and then name it. NaBr Sodium bromide SF2 Sulfur difluoride CCl4 Carbon tetrachloride Na2SO4 Sodium sulfate Mg Magnesium  Balance and tell Types of reactions Synthesis 4 Fe + ____ ____ 3 O → ____ 2 Fe O 2 2 3 Double 3 BaCl2 + ____ ____ 2 H3PO4 → ____ Ba3(PO4)2 + ____ 6 HCl displacement 4 O → ____ Combustion ____ C H + ____ 2 CO + ____ 4 HO 2 8 2 2 2 Heat Transfer Which heat transfer process is primarily responsible for the transfer of heat indicated by the arrows in the beaker of water? Which heat transfer process is primarily responsible for the transfer of heat from the Bunsen burner to the beaker of water?  Heat Transfer Two liquids were heated for 5 minutes. What is the ∆T for each liquid? Which liquid has a higher specific heat capacity? Explain how you know. Endothermic or Exothermic? Negative ∆H Exo Puddle of water evaporating Endo Burning a match Exo Energy is a reactant Endo Breaking bonds Endo Mixing 2 solutions and the temp decreases Endo Heat transferring from the system to the Exo surroundings