1. Slide 1 of 20 © Copyright Pearson Prentice Hall Electron Arrangement in Atoms > The Development of Atomic Models The timeline shoes the development of atomic models from 1803 to 1911. 5.1

2. Slide 2 of 20 © Copyright Pearson Prentice Hall Electron Arrangement in Atoms > The Development of Atomic Models The timeline shows the development of atomic models from 1913 to 1932. 5.1

3. Slide 3 of 20 © Copyright Pearson Prentice Hall Electron Arrangement in Atoms > Atomic Orbitals Different atomic orbitals are denoted by letters. The s orbitals are spherical, and p orbitals are dumbbell-shaped. 5.1 Four of the five d orbitals have the same shape but different orientations in space.

4. Slide 4 of 20 © Copyright Pearson Prentice Hall Electron Arrangement in Atoms > Electron Configurations The ways in which electrons are arranged in various orbitals around the nuclei of atoms are called __________________ configurations. Three rules— the _____________ principle, the _________ ____________ principle, and ____________ rule. 5.2

5. Slide 5 of 20 © Copyright Pearson Prentice Hall Electron Arrangement in Atoms > Electron Configurations Aufbau Principle According to the ____________ principle, electrons occupy the orbitals of _____________ energy _______________. In the aufbau diagram below, each box represents an atomic orbital. 5.2

6. Slide 6 of 20 © Copyright Pearson Prentice Hall Electron Arrangement in Atoms >

7. Slide 7 of 20 © Copyright Pearson Prentice Hall Electron Arrangement in Atoms > Electron Configurations Pauli Exclusion Principle According to the __________ _____________ principle, an atomic orbital may describe at most _________ electrons. To occupy the same orbital, two electrons must have ___________ spins; that is, the electron spins must be _____________. 5.2

8. Slide 8 of 20 © Copyright Pearson Prentice Hall Electron Arrangement in Atoms > Electron Configurations Hund’s Rule ______________ rule states that electrons occupy orbitals of the same _______________ in a way that makes the number of electrons with the __________ ____________ direction as ______________ as possible. 5.2

9. Slide 9 of 20 © Copyright Pearson Prentice Hall Electron Arrangement in Atoms > Electron Configurations Orbital Filling Diagram 5.2

10. © Copyright Pearson Prentice Hall Slide 10 of 20

11. © Copyright Pearson Prentice Hall Slide 11 of 20 Practice Problems for Conceptual Problem 1.1 8. Write the electron configuration for each atom. a. carbonb. argonc. nickel

12. © Copyright Pearson Prentice Hall Slide 12 of 20 Practice Problems for Conceptual Problem 1.1 Problem Solving 5.9 Solve Problem 9 with the help of an interactive guided tutorial.