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IX. 3. Molecular Polarity p. 198-204
Polar Molecules The bond between atoms with different electronegativities gives rise to a dipole Dipole-dipole bonds are stronger than London Forces
Ex: H-Cl Has dipoles Unbalanced/ asymmetrical Dipole-dipole bond between molecules Polar molecule
Ex: Cl-Cl no dipoles Balanced molecule only London forces present between molecules Non-polar molecule
Other examples: H 2 O BI 3 O 2 CCl 4 CCl 3 H
Boiling & Melting Temperature Ionic highest bp & mp Then if covalent: Polar molecule with a H-bond Polar molecule Higher # of electrons (atomic #)
Ex: N 2 (l) = - 196 C Covalent Non-polar Low mp & bp
O 2 (l) = - 183 C Covalent Non-polar More electrons than N
NO (l) = - 152 C Polar covalent So higher mp & bp than non-polar covalents
Why do some solids dissolve in water but others do not? Why are some substances gases at room temperature, but others are liquid or solid? The answers.
Intermolecular Forces. Dispersion or London Forces Weakest intermolecular force Constant motion of electrons may lead to uneven distribution of electrons.
Covalent network lattices and covalent layer lattice.
Intermolecular Forces. Review Substances can be placed into four possible categories. 1. Ionic 2. Metallic 3. Network covalent 4. Molecular.
Cornell Notes Topic: Sect. 8.5: Electronegativity and Polarity Date: 2/14/2012 (Answer the 11 questions from on the following slides in your notebook.
Covalent Bonds. Form when two or more non-metal atoms SHARE electrons. There is no transfer of electrons.
Covalent Carbon always forms 4 bonds Can form both polar and non-polar compounds Being organic means you have carbon Non-electrolytes Molecular.
Electronegativity and Polarity. Describe how electronegativity is used to determine bond type. Compare and contrast polar and nonpolar covalent bonds.
Polarity Chapter 6.1. Review A covalent bond is formed between two non-metals. Electrons are shared. Orbitals are overlapping.
shared bonding electrons pairs are pulled (as in a “tug-of-war”) between atoms results in an equal or unequal sharing.
What are Intermolecular forces? Intermolecular forces are weak forces of attraction between some covalent molecules. These attractions are responsible.
Bonding What exactly is a bond? Depends…Ionic or Covalent? Polar? NON-POLAR COVALENT=> equal sharing of electron pair 0 < ∆EN < 0.4 POLAR COVALENT= unequal.
9-9 Intermolecular Forces (IMFs) ~ (Section 14.3) And you.
Ionic Bond bond formed by the giving or taking of electrons.
Y12 Chemistry. Having poles Opposite ends In molecules its respect to charge Covalent bonds can be either polar or non-polar Polarity.
Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. – In a polar molecule, one end of the molecule is slightly negative, and the.
Section 12.1 Characteristics of Chemical Bonds 1.To learn about ionic and covalent bonds and explain how they are formed 2.To learn about the polar covalent.
Intermolecular Forces. 2 Solids, Liquids, and Gases.
Covalent Bonding Sec. 8.5: Electronegativity and Bond Polarity.
Section 12.1 Characteristics of Chemical Bonds 1.To understand the nature of bonds and their relationship to electronegativity 2.To understand bond polarity.
8-2: Polarity. Remember electronegativity… An atom’s ability to attract electrons in a chemical bond. Polar bond: electrons are shared unequally between.
Aim: What are polar bonds and polar molecules? Polar and Nonpolar Bonds There are two types of covalent bonds Nonpolar Covalent Bonds (share electrons.
Polar Bonds and Molecules Chapter 8.4. – 1.7 to 4.0: Ionic Bond – 0.3 to 1.7: Polar Covalent Bond – 0.0 to 0.3: Non-Polar Covalent Bond If the difference.
INTERMOLECULAR FORCES Chap. 13: Day 2. Type of Bond determines Forces Generally strongest “Interparticle” Ionic Bond Ion-ion force Metalic bond.
Chemistry 1011 Slot 51 Chemistry 1011 TOPIC Physical Properties of Matter TEXT REFERENCE Masterton and Hurley Chapter 9.
Polarity Bonds and molecules. Types of bonds Ionic bonds occur when an atom of low ionisation energy loses valence electrons to an atom of high ionisation.
Molecular Interactions Polar and Non Polar Substances.
3.4 INTERMOLECULAR FORCES. INTERMOLECULAR FORCE An attraction between molecules Weaker than the forces within the molecules.
Aim: What holds molecules to each other? DO NOW: EXPLAIN WHY A MOLECULE CONTAINING POLAR BONDS IS NOT NECESSARILY A POLAR MOLECULE. GIVE AN EXAMPLE OF.
Intermolecular Forces Chemistry 11 Ms. McGrath. Intermolecular Forces The forces that bond atoms to each other within a molecule are called intramolecular.
Polar vs. Non Polar Molecules. Covalent/Molecular Compounds All molecular compounds are either polar or nonpolar.
. The greek symbol indicates “partial charge”. H2H2 HClLiCl ++ –– 00 00 +– 1. Non-polar covalent 2. Polar covalent3. Ionic HH H Cl [Li] + [
London Dispersion Forces. A nonpolar molecule is a molecule that has a symmetrical shape. A nonpolar molecule is a molecule in which the electrons are.
Covalent Bonding Molecular bonding. 2 Non-metals electrostatic attraction (+ and -) between the electrons of one atom and the nucleus of another atoms.
Polar Molecules H F electron rich region electron poor region
Aim: What are polar bonds and polar molecules? Polar and Nonpolar Bonds There are two types of covalent bonds Nonpolar Covalent Bonds (equal share of.
Solubility: Molecular Polarity. How do molecules stay together?
INTERMOLECULAR FORCES. Three types of force can operate between covalent (not ionic) molecules: Dispersion Forces also known as London Forces as Weak.
Chemistry Chapter 13 Notes #3 Intermolecular Forces.
+ Polarity and Intermolecular Forces. + Types of bonds Ionic – transfer of e- from one atom to another Covalent - sharing of e- between atoms a) nonpolar.
Forces. Types of Bonds Intramolecular Bonding Intra Molecular – Bonding ________ __________ - metal + non metal __________ - non metal + non metal.
Polarity of Bonds Molecular Polarity. Equal Pull on Electrons If there is no difference in the electronegativity of the atoms forming a covalent bond,
Polarity. Polar Covalent Remember ionic bonds transfer electrons, while covalent bonds share electrons. All atoms do not attract their electrons in a.
Thinking (Electro) Negatively Making Sense page 139.
Section 9.5 Electronegativity = ? –Ability to attract electrons When atoms react, the electronegativity between atoms will determine which type of bond.
Intermolecular Forces of Attraction (IMFs). Definitions IMF: a force of attraction between molecules of the same type Bonds are INTRAmolecular forces.
Polar Bonds and Molecules. Bond Polarity Not all covalent bonds are equal in their sharing of electrons A lot depends on the type of atoms involved.
Bond and Molecular Polarity Courtesy of Mr. Christopherson.
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