QUANTUM NUMBERS

• n = PRINCIPAL ENERGY LEVELVALUES: 1, 2, 3, 4, 5, 6, 7

• l = ANGULAR MOMENTUMVALUES: 0, 1, 2, 3, ….n-1NOTE: 0 s, 1 p, 2 d, 3 f

• m = MAGNETICVALUES: + l …2, 1, 0, -1, -2, …- l

• ms = SPIN

VALUES: +1/2 OR –1/2

Chapter 6 - Continued

MODELS OF THE ATOM

1. ELECTRON DIAGRAM

2. ELECTRON

CONFIGURATION

KEYS TO MODELS

ORDER OF ORBITALS

1s 2s 2p 3s 3p 4s 3d 4p 5s etc.&

NUMBER OF EACH TYPE OF ORBITALs - TYPE ORBITALS 1 EACHp - TYPE ORBITALS 3 EACHd - TYPE ORBITALS 5 EACH

f - TYPE ORBITALS 7 EACH

EXAMPLES

Mg

F

Ne

Ar

THE QM MODEL & THE PERIODIC TABLE

• ELECTRON DIAGRAM

• ELECTRON CONFIGURATION

• VALENCE ELECTRONS (PAIRED & UNPAIRED)

• GROUPS

• PERIODS

• NOBLE GASES

• OXIDATION NUMBERS

The Periodic Table

Subshell Location on the Periodic Table

There is a specific number of electrons in each subshell block.

1 s1 s2 p1 p2 p3 p4 p5 p6

23 d1 - d10

456

f1 - f14

Subshell Blocks

FOR AN ATOM OF SULFURDRAW ELECTRON DIAGRAMDRAW ELECTRON CONFIGURATIONWHAT IS # OF VALENCE ELECTRONS?HOW MANY VALENCE ELECTRONS ARE

UNPAIRED?HOW MANY PAIRS OF VALENCE

ELECTRONS?IN WHAT PERIOD IS THE ELEMENT?IN WHAT GROUP IS THE ELEMENT?WHAT ARE THE QUANTUM NUMBERS OF

THE ELECTRONS IN THE 3p ORBITALS?

FOR AN ATOM OF PHOSPHORUSDRAW ELECTRON DIAGRAMDRAW ELECTRON CONFIGURATIONWHAT IS # OF VALENCE ELECTRONS?HOW MANY VALENCE ELECTRONS ARE

UNPAIRED?HOW MANY PAIRS OF VALENCE

ELECTRONS?IN WHAT PERIOD IS THE ELEMENT?IN WHAT GROUP IS THE ELEMENT?WHAT ARE THE QUANTUM NUMBERS OF

THE ELECTRONS IN THE 3p ORBITALS?

EXAMPLESWRITE THE ELECTRON DIAGRAM & ELECTRON CONFIGURATION FOR AN

ATOM OFHeLiNeF

NaClAr