Presentation is loading. Please wait.

Presentation is loading. Please wait.

Electron Configuration Electrons in Atoms Adapted from Christy Johannesen

There are copies: 1
IV. Electron Configuration (p , ) Ch. 4 - Electrons in Atoms.

Similar presentations


Presentation on theme: "Electron Configuration Electrons in Atoms Adapted from Christy Johannesen"— Presentation transcript:

1 Electron Configuration Electrons in Atoms Adapted from Christy Johannesen

2 A. General Rules zPauli Exclusion Principle yEach orbital can hold TWO electrons with opposite spins.

3 A. General Rules zAufbau Principle yElectrons fill the lowest energy orbitals first. yLazy Tenant Rule

4 RIGHT WRONG A. General Rules zHunds Rule yWithin a sublevel, place one e - per orbital before pairing them. yEmpty Bus Seat Rule

5 O 8e - zOrbital Diagram zElectron Configuration 1s 2 2s 2 2p 4 B. Notation 1s 2s 2p

6 zShorthand Configuration S 16e - Valence Electrons Core Electrons S16e - [Ne] 3s 2 3p 4 1s 2 2s 2 2p 6 3s 2 3p 4 B. Notation zLonghand Configuration

7 © 1998 by Harcourt Brace & Company s p d (n-1) f (n-2) C. Periodic Patterns

8 zPeriod # yenergy level (subtract for d & f) zA/B Group # ytotal # of valence e - zColumn within sublevel block y# of e - in sublevel

9 s-block1st Period 1s 1 1st column of s-block C. Periodic Patterns zExample - Hydrogen

10 C. Periodic Patterns zShorthand Configuration yCore e - : Go up one row and over to the Noble Gas. yValence e - : On the next row, fill in the # of e - in each sublevel.

11 [Ar]4s 2 3d 10 4p 2 C. Periodic Patterns zExample - Germanium

12 zFull energy level zFull sublevel (s, p, d, f) zHalf-full sublevel D. Stability

13 zElectron Configuration Exceptions yCopper EXPECT :[Ar] 4s 2 3d 9 ACTUALLY :[Ar] 4s 1 3d 10 yCopper gains stability with a full d-sublevel. D. Stability

14 zElectron Configuration Exceptions yChromium EXPECT :[Ar] 4s 2 3d 4 ACTUALLY :[Ar] 4s 1 3d 5 yChromium gains stability with a half-full d-sublevel. D. Stability

15 zIon Formation yAtoms gain or lose electrons to become more stable. yIsoelectronic with the Noble Gases.

16 O 2- 10e - [He] 2s 2 2p 6 D. Stability zIon Electron Configuration yWrite the e - config for the closest Noble Gas yEX: Oxygen ion O 2- Ne


Download ppt "Electron Configuration Electrons in Atoms Adapted from Christy Johannesen"

Similar presentations


Ads by Google