Polarity of Bonds Molecular Polarity. Equal Pull on Electrons If there is no difference in the electronegativity of the atoms forming a covalent bond,

Slides:

Advertisements

Similar presentations

NELSON CHEMISTRY 12 SECTION 4.4 POLARITY What is the name of 007’s Inuit cousin? Polar Bond.

Advertisements

Thinking (Electro) Negatively Making Sense page 139.

Electronegativity and Polarity.  Describe how electronegativity is used to determine bond type.  Compare and contrast polar and nonpolar covalent bonds.

Molecular Compounds Unit 7. Covalent Bonds Sharing pairs of electrons Sharing pairs of electrons Covalent bonds are the intra-molecular attraction resulting.

3.3 Polar bonds and Polar Molecules. Polar Bonds Polar covalent bonds have 0 < ∆En < 1.7 ∆En = 0Pure covalent 0 < ∆En < 0.4Slightly polar 0.5 < ∆En

Polar Bonds and Molecules

Chapter 4, Section 2 Covalent Bonds

Homonuclear & Heteronuclear bonds Homonuclear bondsHetronuclear bonds Ethane (C 2 H 6 ) Hydrazine (N 2 H 4 ) Hydrogen peroxide (H 2 O 2 )

Section 5.4—Polarity of Molecules

Predicting Molecular Polarity  When there are no polar bonds in a molecule, there is no permanent charge difference between one part of the molecule and.

The Ionic bond exists between atoms that __________________ electrons.

Covalent Bonds. Form when two or more non-metal atoms SHARE electrons. There is no transfer of electrons.

Aim: What are polar bonds and polar molecules?

HW: Read pages Draw the Lewis structure, write the formula, and indicate the shapes for the following compounds: Silicon tetrabromide Hydrogen.

1 Electronegativity? The ability of an atom in a molecule to attract shared electrons to itself. The ability of an atom in a molecule to attract shared.

 A covalent bond is formed when two or more nuclei share electrons in order to achieve a stable electron configuration (noble gas).  Covalent bonds.

Bond and Molecular Polarity Courtesy of Mr. Christopherson.

COVALENT BONDING Hold on to your electrons!. What is a covalent bond? Atoms ___________ one or more electrons with each other to form the bond. Each atom.

MOVING FROM ECOLOGY TO BIOCHEMISTRY. BIOCHEMISTRY LEVELS OF ORGANIZATION Organisms Organ Systems OrgansTissues CellsMoleculesAtoms Subatomic Particles.

1 Molecular Polarity. 2 Polar Molecules Polar molecules are molecules that have a slightly positive end or pole and a slightly negative end or pole. The.

Polar Bears and Penguins Making Sense page 135. Unit 2 Investigation IV The ability of an atom to attract electrons shared between two atoms is called.

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.

Bond Polarity Connecting to you Snow covers approximately 23% of Earth’s surface. Each individual snowflake is formed from as many as 100 snow crystals.

Unit 4A ACS Chemistry in the Community Sixth Edition.

Covalent Bonds Ch 8. Covalent Bonding In these bonds electrons are shared between the nuclei of two atoms to form a molecule or polyatomic ion Usually.

 A covalent bond is formed when two atoms share electrons.  Covalent bonds usually form between two or more nonmetals. CO  A molecule is a neutral.

Bond Polarity. Electronegativity Trend Page 161 in textbook.

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.

  In covalent bonding, the two electrons shared by the atoms are attracted to the nucleus of both atoms. Neither atom completely loses or gains electrons.

8 - 1 Intermolecular Forces Intermolecular forces are attractive forces between molecules. The type of intermolecular forces present dependent upon: 

Chapter 5 Section 3 Notes The chemical bond formed when two atoms share electrons is called a covalent bond. Except for noble gases, nonmetals can bond.

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.

Polar Bonds and Molecules (8.4) Bond Polarity Bond polarity has to do with unequal distribution of shared electrons This causes one end of the bond to.

Polar Bonds and Molecules Notes. Bond Polarity The bonding pairs of electrons are pulled in a tug-of-war between the nuclei of the atoms sharing the electrons.

Section 12.1 Characteristics of Chemical Bonds 1.To understand why atoms form bonds 2.To learn about ionic and covalent bonds and explain how they are.

Electronegativity. Ability of an atom to attract electrons towards itself in a chemical bond Electronegativity.

Molecular Orbital Theory (What is it??)  Better bonding model than valence bond theory  Electrons are arranged in “molecular orbitals”  Dealing with.

Bond Polarity & Molecular Polarity.  Occur when there is equal sharing of electrons between two atoms.  Form between:  Two identical nonmetal atoms.

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.

EXAMINING POLARITY. MICRO-TO-MACRO We have studied the shapes and structures of molecules The shape of a molecule affects how that molecule behaves The.

Ch 8 WEDNESDAY 3/21/12 Section 8.1Section 8.1The Covalent Bond Objective: To describe the formation & strength of covalent bonds Section 8.2 Naming Molecules.

Covalent Bonds. Form when two or more non-metal atoms SHARE electrons. There is no transfer of electrons.

Homonuclear & Heteronuclear bonds Homonuclear bondsHetronuclear bonds Ethane (C 2 H 6 ) Hydrazine (N 2 H 4 ) Hydrogen peroxide (H 2 O 2 )

Valence electrons are the outer shell electrons of an atom. The valence electrons are the electrons that participate in chemical bonding. 1A 1ns 1 2A.

Polarity Ch 6.2b.  Diatomic compounds share electrons equally.  Equal forces pulling on the shared electrons  What happens when atoms do NOT share.

What you’ve learned so far…..  Atoms form bonds in more than one way  In IONIC bonding, atoms give up or gain electrons  In COVALENT bonding, atoms.

Molecular Compounds Polarity.

O STRUCTURE OF WATER 1 molecule of water is

I. Introduction to Bonding (p. 161 – 163)

3.7: Polar Covalent Bonds and Electronegativity

Electronegativity and Polarity

Notes: 9.5 OBJECTIVES: Students will be able to (SWBAT)

What is the role of electronegativity?

Introduction to Bonding

COVALENT BONDS.

Polar and Nonpolar Cl H -Electronegativity is the ability of an atom to pull or attract electrons shared between two atoms -An atom.

Electronegativity and Polarity

Introduction to Chemical Bonding

Bonding & Polarity SCH3U/4C Ms Richardson.

I. Introduction to Bonding (p. 161 – 163)

Essential Question: What are polar bonds and polar molecules?

What are polar bonds and polar molecules?

Chapter 6 -1 Bond Polarity (p. 198 – 201)

Electronegativity and Polarity

Electronegativity and Polarity

Polar versus Nonpolar.

I. Introduction to Bonding

Electronegativity and Polarity

Presentation transcript:

Polarity of Bonds Molecular Polarity

Equal Pull on Electrons If there is no difference in the electronegativity of the atoms forming a covalent bond, it forms a non-polar covalent bond. Bonded electrons are shared equally between the two atoms.

Unequal Pull on Electrons If there is a difference in the electronegativity of the atoms forming a covalent bond, it forms a polar covalent bond.

Expressing Polar Bonds Polar bonds are represented visually by bond dipoles. The dipole shows the direction of the more negative charge density and the strength of the dipole.

Electron Density The atom with the higher electronegativity will hold the electrons in the bond more often and has a partial negative charge.

Nonpolar Molecules Binary molecules with a nonpolar bond do not have a molecular dipole. Molecules with polar bonds can be nonpolar if the dipoles are of equal strength and in cancelling directions.

Polar Molecules Polar molecules are affected by electrical fields and have electrostatic interactions with other molecules. POSITIVE FIELD NEGATIVE FIELD

Polarity Practice 1) True or False: The molecule below has no bond dipole.

Polarity Practice 2) True or False: The molecule below has no bond dipole.

Polarity Practice 3) True or False: The molecule below is polar.

Polarity Practice 4) True or False: This molecule contains bond dipoles and has a molecular dipole.

Polarity Practice 5) True or False: This molecule contains bond dipoles and has a molecular dipole.

Polarity Practice 6) True or False: This molecule contains bond dipoles and has a molecular dipole.

Polarity Practice 7) True or False: This molecule contains bond dipoles but has no molecular dipole.

Polarity Practice 8) True or False: This molecule contains bond dipoles but has no molecular dipole.