NAME: 1. Identify these elements: a. A very reactive metal with properties similar to sodium and in the same period as iodine …………………………… (name) b. A nonmetal in the same group as gallium ………………… (symbol) 2. What period are the following elements in? a. Fe _______________ b. Sb _________________ 3. What group are the following elements? a. Phosphorus _______________ b. Scandium_________________ 4. Give me an atom with the following characteristics. Halogen _________________ Alkali metal ______________ Nobel gas ________________ 5. What is the atomic mass of xenon? 6. The element that has the atomic number 29 is? 7. Si, Sn, and Pb are all in what group # 8. What is the average atomic mass of selenium? 9. What is the first element in period 4? 10. What is the last element in 2 group ? 11. What is the atomic number of: 12. What is the Atomic mass of: Argon____ Magnesium___ Iodine _____ Pottasium_____ 13. How many protons do the following have? Sodium____ Gold_______ 14. How many electrons do the following have? Gold____ Carbon_____ 15. Does mercury have more protons and electrons than tin? 16. Is magnesium a heavier element than sodium? NAME: 1. Identify these elements: a. A very reactive metal with properties similar to sodium and in the same period as iodine …………………………… (name) b. A nonmetal in the same group as gallium ………………… (symbol) 2. What period are the following elements in? a. Fe _______________ b. Sb _________________ 3. What group are the following elements? a. Phosphorus _______________ b. Scandium_________________ 4. Give me an atom with the following characteristics. Halogen _________________ Alkali metal ______________ Nobel gas ________________ 5. What is the atomic mass of xenon? 6. The element that has the atomic number 29 is? 7. Si, Sn, and Pb are all in what group # 8. What is the average atomic mass of selenium? 9. What is the first element in period 4? 10. What is the last element in 2 group ? 11. What is the atomic number of: 12. What is the Atomic mass of: Argon____ Magnesium___ Iodine _____ Pottasium_____ 13. How many protons do the following have? Sodium____ Gold_______ 14. How many electrons do the following have? Gold____ Carbon_____ 15. Does mercury have more protons and electrons than tin? 16. Is magnesium a heavier element than sodium? 17. Does sulfur have more electrons than chlorine? 18. Does neptunium have more electrons than uranium? 19. Which has more protons, bromine or iodine? 20. Identify the period and group in which the elements with the following electron configurations are located. Period_____ Group_____ a. K2L7 Period_____ Group_____ b. K2L8M7 Period_____ Group_____ c. K2L8M18N7 21. Write the electron configuration for each of the following elements. _______________a. Group 13, Period 3 _______________b. Group 2, Period 4 _______________c. Group 17, Period 2 22. I-133 and I-131 are isotopes of iodine. Complete the table below. Atomic # Mass # # of protons # of neutrons I-133 I-131 17. Does sulfur have more electrons than chlorine? 18. Does neptunium have more electrons than uranium? 19. Which has more protons, bromine or iodine? 20. Identify the period and group in which the elements with the following electron configurations are located. Period_____ Group_____ a. K2L7 Period_____ Group_____ b. K2L8M7 Period_____ Group_____ c. K2L8M18N7 21. Write the electron configuration for each of the following elements. _______________a. Group 13, Period 3 _______________b. Group 2, Period 4 _______________c. Group 17, Period 2 22. I-133 and I-131 are isotopes of iodine. Complete the table below. Atomic # Mass # # of protons # of neutrons I-133 I-131