Chemistry Unit 3 Electron Location Study Guide Learning Target: Draw the Bohr model of the atom; labeling the parts Use the Bohr model to answer following questions 1. What do the rings (A.) represent in the Bohr Model?_________________________________ 2. What element is this? ______________________ How do you know? ___________________________________ 3. How many valance electrons does this element have? 4. Draw an arrow that points to the nucleus of this Bohr diagram. Draw the following Bohr Models and indicate how many valence electrons each element has. Learning Target: Determine valence electrons for any element or ion Directions : Fill in the blanks in the following paragraph You can find the number of valence electrons by drawing a Bohr diagram and then counting the electrons in the _________________ ring. However, there is an easier way to find valence electrons that does not involve drawing a Bohr diagram at all. Finding valence electrons the easy way is done by _____________________________________ _______________________________________________________________________________________. Learning Target: Describe the Pauli, Aufbau, and Hund’s rules for electron location a) b) c) Explain why each of these diagrams are wrong and what rule is being broken (Pauli, Aufbau or Hund) a. b. c. Learning Target: Write the electron configuration for any element or ion Write the noble gas configuration for any element or ion Directions: Fill in the chart below: Type of Orbital Number of orbitals Total number of Location on P.T. e present when full Example 1 p 5 Inner transition metals A. Write the electron configurations (Long hand and Noble gas notations) for the following elements: Carbon Cerium B. Identify the element with the following electron configurations: 22 6 2 4 a.) 1s 2 2p 3s 3p element: 2 b.) 1s element: 2 7 c.) [Ar]4s 3d element: 2 14 10 4 d.) [Xe]6s 4f5d6p element: 2 2 6 2 6 2 10 6 2 3 e.) 1s 2s 2p 3s 3p 4s 3d4p 5s 4d element: C. Write the electron configuration for the following ions : +2 a. Ca ______________________________________________ 4 b. Ge ______________________________________________ 1 c. Br ______________________________________________ Learning Target: Determine the Valence electrons for any element. How many valence electrons are in the following elements? Li______ Be_______ B_______ C_______ N_______ O________ F_______ Ne________ How many valence electrons are in the following ions? +1 +2 +3 4 3 2 1 K _______ Ca _______Ga ______Ge _______As ________Se _______Br _______
© Copyright 2026 Paperzz