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CHEM 104 CHAPTER 2 QUESTIONS: Give four examples each of metals, nonmetals and metalloids. How many protons, neutrons and electrons are there in each of the following? 37 Br 24 Mg 2 ____________________________ ____________________________ 37 Br ____________________________ 235 U6 ____________________________ Write the symbol for an atom containing each of the following: 6 protons, 6 neutrons, 6 electrons ________ 6 protons, 7 neutrons, 8 electrons ________ 1 protons, 0 neutrons, 0 electrons ________ 50 protons, 58 neutrons, 48 electrons ________ Calculate the average atomic weight of antimony (Sb) which is composed of two isotopes: 57.3% Sb-121 with atomic mass 120.9 amu and 42.7% Sb-123 with atomic mass 122.9 amu. Classify each of the following as alkali metal, alkaline earth metal, halogen, noble gas, transition metal, rare earth element or none of these. sodium ________________________ oxygen ________________________ hydrogen ________________________ argon ________________________ silver ________________________ magnesium ________________________ uranium ________________________ fluorine ________________________ tungsten ________________________ aluminum ________________________ How many sublevels are there in the third energy level? ________ How many orbitals are there in the third energy level? ________ How many electrons can the third energy level hold? ________ How many electrons can the first energy level hold? ________ How many electrons can the fifth energy level hold? ________ How many electrons can a p-orbital hold? ________ How many electrons can the 3p sublevel hold? ________ Write the ground state electron configuration for each of the following atoms. H ______________________ He ______________________ Li ______________________ Be ______________________ C ______________________ F ______________________ Ca ______________________ S ______________________ How many valence electrons, and how many core electrons, in each of the following atoms? H He Li Be C F Ca S Pb Valence Core Draw a Lewis dot diagram for each of the following atoms. H He Li Be C F Ca S Pb N Kr K Br Al From each pair, circle the atom with the larger radius. Na or Mg N or P Cl or Ne Li or F From each pair, circle the atom with the larger ionization energy. Na or Mg N or P Cl or Ne Li or F
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