Periodic Trends Introduction Name_________________________________________________Date__________Block_____ Part 1 1. Pick one group from group 1A through 8A: ______ 2. Pick three elements from the group you picked in #1: ____________________________ Element #1 Electron configuration Bohr model Number of protons in nucleus Number of occupied energy levels Number of electrons in highest occupied energy level Element #2 Electron configuration Bohr model Number of protons in nucleus Number of occupied energy levels Number of electrons in highest occupied energy level 1 Periodic Trends Introduction Element #3 Electron configuration Bohr model Number of protons in nucleus Number of occupied energy levels Number of electrons in highest occupied energy level Questions 1. Describe one similarity and one difference in the electron configurations of these elements. ______________________________________________________________________________ ______________________________________________________________________________ 2. Describe one similarity and one difference in the Bohr models of these elements. ______________________________________________________________________________ ______________________________________________________________________________ 3. What happens to the number of protons in the elements as you move down the group? ______________________________________________________________________________ ______________________________________________________________________________ 4. What happens to the number of occupied energy levels as you move down the group? ______________________________________________________________________________ ______________________________________________________________________________ 5. What is the trend in the number of electrons in the highest energy level? ______________________________________________________________________________ ______________________________________________________________________________ 2 Periodic Trends Introduction Part 2 1. Pick one period from period 1 through period 3: ______ 2. Pick three elements from the period you picked in #1: ____________________________ Element #1 Electron configuration Bohr model Number of protons in nucleus Number of occupied energy levels Number of electrons in highest occupied energy level Element #2 Electron configuration Bohr model Number of protons in nucleus Number of occupied energy levels Number of electrons in highest occupied energy level 3 Periodic Trends Introduction Element #3 Electron configuration Bohr model Number of protons in nucleus Number of occupied energy levels Questions 1. Describe one similarity and one difference in the electron configurations of these elements. ______________________________________________________________________________ ______________________________________________________________________________ 2. Describe one similarity and one difference in the Bohr models of these elements. ______________________________________________________________________________ ______________________________________________________________________________ 3. What happens to the number of protons in the elements as you move across the period? ______________________________________________________________________________ ______________________________________________________________________________ 4. What happens to the number of occupied energy levels as you move across the period? ______________________________________________________________________________ ______________________________________________________________________________ 5. What is the trend in the number of electrons in the highest energy level? ______________________________________________________________________________ ______________________________________________________________________________ 4
