1. Name _____________________________________________ Date ________________
Chapter 5 Review
“Electrons in Atoms”
• How many electrons can fit into an energy level?
• How many possible electrons can exist in each energy level?
• Which energy shells have the most energy, which have the least?
• Based on the modern model of the atom, where can you find electrons?
• Know how to fill up an “Aufbau” diagram (electron configuration diagram)
• What are the three rules for electron configurations?

2. • What are valence electrons?
• Know how to determine the number of valence electrons for any element (There are
three ways to do this)
• How does the period of an element relate to the number of occupied principal energy
levels (shells)
• Know how to draw a Lewis dot structures for any element
• What is the ground state and excited state of an atom?
• Know how to recognize an atom as in its ground state or excited state based on its
electron configuration
• What happens to electrons as they fall back to the ground state?