12. Given the elements name and its mass number give the complete isotopic symbol and the number of neutrons for the following: Lithium-6 Iron- 58 Oxygen-17 Krypton-78 Bromine-79 Copper-65 Mercury-200 Helium-3 13. Give the element symbol of and the number of electrons in a neutral atom of: Uranium Boron Chlorine Iodine Xenon 14. Name the element which has the following numbers of particles: a. 26 electrons, 26 protons b. 53 protons, 74 neutrons c. 2 electrons (neutral atoms) d. 20 protons e. 86 electrons, 125 neutrons, 82 protons f. 0 neutrons 15. If you know ONLY the following information can you ALWAYS determine what the element is? (Yes/No) a. Number of protons b. Number of neutrons c. Number of electrons in a neutral atom d. Number of electrons