You need: Chemical Bonding Article Yellow Chemical Bonding paper Is your spiral turned in??? Do it NOW!

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You need Chemical Bonding ArticleYellow
Chemical Bonding paperIs your spiral turned
in??? Do it NOW!

• Unit 6

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Fold your yellow paper like a letter HURRY!
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You have 15 minutes to read the Chemical Bonding
article and transfer the info learned into the
right section of the brochure

• And go.

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Times Up!

• Now check to see if you got the same thing I got
  
• Include my drawings if you didnt have time to
  draw any from the article
• Take good notes gt assignment will be easy!

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A chemical bond is

• An attraction between the nuclei and valence
  electrons of different atoms that holds the atoms
  together (the hook up!!!)

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Why do atoms bond? (outer flap)

• Most elements (besides noble gases) are very
  unstable
• When they bond they become more stable (like a
  noble gas)

Everybody has their 8!!! They had to share to
help each other out.
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How do atoms bond?

• atoms bond by gaining, losing, or sharing e-
• Most Group A elements (s and p - block) want to
  attain an octet (8 valence e-)
• Octet Rule most elements want to have 8 valence
  electrons to achieve stability

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Types of bonding (open flaps)

• Ionic Bonds
• Transfer e- from a metal to a nonmetal
• Smallest ratio is called a formula unit
• Example ? (metal) CaCl2 (nonmetal)

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Ionic Bond (draw label this!)
Higher electronegativity More attractive!
Notice the pair of electrons is all the over on
the right.
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• Covalent
• sharing of e- between 2 nonmetals
• Smallest ratio of a covalent compound is called a
  molecule
• Examples H2 H2O C6H12O6

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2 types of covalent bonds(draw pics too)

• Nonpolar covalent
• Equal sharing of e-
• Example H2

• Polar covalent
• Unequal sharing of e-
• Notice right is pulling harder
• Example HCl

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Polar Covalent Bond

• electrons shared unequally
• Chlorine has higher electronegativity (EN) so it
  pulls harder
• HCl
• Hydrochloric acid

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• Metallic Bonding
• All involved atoms are metals (duh!)
• Electrons are shared in a sea of free flowing
  or mobile electrons by all atoms
• This flow is responsible for ductility,
  malleability, luster and ability to conduct heat
  and electricity
• Example copper wire

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The sea of electrons
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2 ways to determine bond type (fold up your
bottom flap)

• Location on the periodic table
• metal nonmetal Ionic
• nonmetal nonmetal Covalent
• metal metal Metallic

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• 2. taking the difference in the electronegativity
  (subtract!!!)

4.0 ionic 1.7 polar cov 0.3
nonpolar cov

• Sulfur and Hydrogen
• 2.5 2.1 0.4
• Nitrogen and Cesium
• 3.0 0.7 2.3
• Chlorine and Bromine
• 3.0 2.8 0.2

Polar covalent Ionic Nonpolar covalent
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Now you try

• Electronegativity Bond Type Homework
• Dont forget Chemis-Tree project!!! Google ideas!
  Look what I found online

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Happy Thanksgiving!!!

• I am thankful for each of you. Its crazy to me
  that I get paid to do something I love. I love
  your personalities, your laughter, your passion
  about life and your face when youre successful
  at learning something difficult. Be safe next
  week and dont eat too much!
• Love ya! Duley