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Periodic trends

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Periodic trends. L. Minilab. Pg 164 Use graph paper on center counter No lab write up required Answer analysis questions on graph paper Show me completed product. Atomic Radius. Remember: e - cloud is a probability Has no defined edge Outer limit = 90% of finding an e - inside - PowerPoint PPT Presentation
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PERIODIC TRENDS L
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Page 1: Periodic trends

PERIODIC TRENDSL

Page 2: Periodic trends

Minilab Pg 164 Use graph paper on center counter No lab write up required

Answer analysis questions on graph paper Show me completed product

Page 3: Periodic trends

0 2 4 6 8 10 12 14 16 180

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Series1

Molar Heat of Fusion

0 2 4 6 8 10 12 14 16 180

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Molar Heat of Vapor-ization

Page 4: Periodic trends

0 2 4 6 8 10 12 14 16 180

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Series1

Series1

HfHv

Page 5: Periodic trends

Atomic Radius Remember: e- cloud is a probability

Has no defined edge Outer limit = 90% of finding an e- inside

Atomic size – how close an atom lies to it’s neighbor For metals = half the distance b/t adjacent nuclei For non-solids = half the distance b/t nuclei of identical

atoms bonded together chemically Decreases as you move across the period

Why? Increases as you move down families

Why?

Page 6: Periodic trends

Generally DecreasesGe

nera

lly In

crea

ses

Page 7: Periodic trends

Your book is lame… Ions

e- are negatively charged Atoms that gain or lose 1+ gain a net

charge Gains and losses are always in the valence

shell Ion = +/- atom or bonded group of atoms

Page 8: Periodic trends

Ionic Radius What would a positive charge do to the atomic

radii?

What would a negative charge do to the atomic radii?

Periods Decrease till you get to group 5

Families Increase as you go down the periodic table

Page 9: Periodic trends
Page 10: Periodic trends

MINI DEMO Moo-licious

Page 11: Periodic trends

Ionization energy Energy needed to remove a curtain # of e- from an

atom’s valence shell 1st ionization energy

Periods Increases

Families Decreases

Why? What has the greatest 1st ionization energy? NOBLE GASES!!!

Octet rule: Atoms will gain/lose e- to become more stable and have a perfect octet (like a noble gas)

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Electronegativity Ability of an atom to attract e- in a

chemical bond Noble gases aren’t part of this b/c they

don’t react readily with anything Higher electronegativity pulls more on

the e-

Periods Increases from left to right

Families Decreases going down

Page 15: Periodic trends

F

My name is Fluorine.

Ryan Seacrest is gay.Paula is stupid.

You should never sing again.

I once was in a band.

That will be $15 Million.

Page 16: Periodic trends

Fr Cs

Oh Francium, I feel we can

share anything

I very much agree. By the way, Cesium, thanks for letting me borrow your shoes.

I have shoes? Where? Which

orbital??

Page 17: Periodic trends

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