Chapter 5: Periodic properties AKA: RUSSIAN ATTACK Describe the historical development of the...

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Chapter 5: Periodic properties AKA: RUSSIAN ATTACK Describe the historical development of the Periodic Table Predict the number of valence electrons of an element Predict the ion charge of an element list the trends of atomic radius and electronegativity

Transcript of Chapter 5: Periodic properties AKA: RUSSIAN ATTACK Describe the historical development of the...

Page 1: Chapter 5: Periodic properties AKA: RUSSIAN ATTACK Describe the historical development of the Periodic Table Predict the number of valence electrons of.

Chapter 5: Periodic properties AKA: RUSSIAN ATTACK

Describe the historical development of the Periodic Table

Predict the number of valence electrons of anelement

Predict the ion charge of an element

list the trends of atomic radius and electronegativity

Page 2: Chapter 5: Periodic properties AKA: RUSSIAN ATTACK Describe the historical development of the Periodic Table Predict the number of valence electrons of.

Chapter 5: Periodic Properties

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Page 3: Chapter 5: Periodic properties AKA: RUSSIAN ATTACK Describe the historical development of the Periodic Table Predict the number of valence electrons of.

A. Mendeleev

Dmitri Mendeleev 1869

Elements with similar propertieswere put into families.

His grouping had some missing spaces

Mendeleev predicted the properties of themissing elements very accurately

Page 4: Chapter 5: Periodic properties AKA: RUSSIAN ATTACK Describe the historical development of the Periodic Table Predict the number of valence electrons of.

A. Mendeleev

Page 5: Chapter 5: Periodic properties AKA: RUSSIAN ATTACK Describe the historical development of the Periodic Table Predict the number of valence electrons of.

B. Electron Config

Hydrogen 1s1Helium 2LithiumBeryllium 2s12Neon 1s22s22p6Argon 1s22s22p63s23p6Calcium 1s22s22p63s23p64s21s22s22p63s23p64s23d10ZincKrypton 4p6

Outer shell electronsVALENCE electrons

Valence electronsdetermine bonding

Magnesium 1s22s22p63s2

Page 6: Chapter 5: Periodic properties AKA: RUSSIAN ATTACK Describe the historical development of the Periodic Table Predict the number of valence electrons of.

C. Valence Electrons

1 2 2 or 1 3 4 5 6 7 8

Main Group

Page 7: Chapter 5: Periodic properties AKA: RUSSIAN ATTACK Describe the historical development of the Periodic Table Predict the number of valence electrons of.

D. Atomic Radius

Distance from nucleus to _____________

Increases

Decreases

WHY? DOWN: Adding shells

RIGHT: protons pull electrons closer to nucleus

valence electrons

Page 8: Chapter 5: Periodic properties AKA: RUSSIAN ATTACK Describe the historical development of the Periodic Table Predict the number of valence electrons of.

E. Electronegativity

Measure of ability for element to ___________

Based on a score of 0-4; F is highest at 4.0

Decreases

Increases

DOWN:

RIGHT:

Adding shells; they want to lose

Getting closer to octet

WHY?

gain electrons

Page 9: Chapter 5: Periodic properties AKA: RUSSIAN ATTACK Describe the historical development of the Periodic Table Predict the number of valence electrons of.

F. Ions

Atoms want to get an ______________________octet (8) of valence electrons

+1

+2

+1 to +7

+3±4-3 -2-10

Positive ions (K+, Mg+2, Al+3): _________Negative ions (F-, O-2, P-3): ___________

CATIONS

ANIONS

These charges are called oxidation states or valence.

Page 10: Chapter 5: Periodic properties AKA: RUSSIAN ATTACK Describe the historical development of the Periodic Table Predict the number of valence electrons of.

Atomic Radius

0

50

100

150

200

250

0 5 10 15 20Atomic Number

Ato

mic

Rad

ius

(pm

)

Page 11: Chapter 5: Periodic properties AKA: RUSSIAN ATTACK Describe the historical development of the Periodic Table Predict the number of valence electrons of.

Electronegativities


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In This Lesson: Valence Electrons Periodic Table Today is · PDF file · 2017-10-06Today [s Agenda •Study Guide for Core Assessment •Valence Electrons •Lewis Dot Structures

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