Chapter 6 Predicting Outer Electron Configurations Parts 1

Chapter 6 Predicting Outer Electron Configurations Parts 1 & 2

Electron Configurations • 11 Na • 19 K • 16 S • 34 Se • 22 Ti • 40 Zr

Period # = Outer Energy Level Includes lanthanides Includes actinides

Elements in the Same Group • Elements in the same group have similar properties because they have similar electron configurations.

Sublevel Blocks of the Periodic Table

Not all periodic tables look exactly the same.

Not all periodic tables look exactly the same. o

Blank Periodic Table

Periodic Table and Electron Configuration s = period # p = period # 1 1 2 2 3 d = (period# - 1) 3 4 4 5 5 6 6 7 7 f = (period# - 2)

Predict the electron configuration for the last sublevel. • 20 Ca o

Predict the electron configuration for the last sublevel. • 20 Ca • 82 Pb o

Predict the electron configuration for the last sublevel. • 20 Ca • 82 Pb • 47 Ag o

Predict the electron configuration for the last sublevel. • 20 Ca • 82 Pb • 47 Ag • 92 U o

Periodic Table and Electron Configuration s = period p = period 1 2 d = (period-1) 3 4 5 6 7 6 7 f (period-2) © 1998 by Harcourt Brace & Company

1 2 3 4 5 6 7

Abbreviated Electron Configurations: “A Shortcut”

Write the electron configuration for lead (Z = 82) using the periodic table. O 6 7 © 1998 by Harcourt Brace & Company

C. Periodic Patterns • Example – Germanium (Z = 32) [Ar] 2 4 s 10 3 d 2 4 p

Write the electron configurations. 20 Ca 94 Pu 77 Ir

Write the electron configurations. • 20 Ca = [Ar]4 s 2 • 94 Pu = [Rn]7 s 25 f 6 • 77 Ir = [Xe]6 s 24 f 145 d 7

Homework • Worksheet: Electron Configuration and the Periodic Table. • Worksheet : Predicting electron configurations Make sure you use the periodic table suggested for your assignment or your answers may vary slightly.