covalent bonds. form when two or more non-metal atoms share electrons. there is no transfer of...

Covalent Bonds

Upload: garey-kory-wilcox

Post on 26-Dec-2015

224 views

Category:

Documents

0 download

Report

Download

Tags:

Embed Size (px):

TRANSCRIPT

Covalent Bonds

Form when two or more non-metal atoms SHARE electrons.

There is no transfer of electrons.

Covalent Bonds

What holds a covalent bond together?

__________________________________________________________________________

Covalent Bonds

These are the three types of chemical bonds that you must know:

Covalent Bonds

Using electronegativity to determine what kind of bond will form

Electronegativity:

__________________________

Covalent Bonds

Non-Polar Covalent Bond Electronegativity values for the two atoms are

equal Atoms attract electrons with the same force Electrons are shared equally.

Covalent Bonds

Polar Covalent Bonds Electronegativity values differ significantly Electrons are shared unequally Electrons are found by the atom with the highest

electronegativity.

Covalent Bonds

Ionic Bond Review Electronegativity values are extremely different Electron spends so much time at the atom with

high electronegativity, it is thought as being “transferred” to that atom

Covalent Bonds

Electronegativity Difference and Bond Character

Electronegativity Difference

Type of Bond

0.0 – 0.5 Non-polar covalent

0.6 – 1.9 Polar Covalent

2.0 – 3.3 Ionic

Covalent Bonds

DipolesOccur in polar covalent bonds Electrons spend more time around the atom with higher electronegative chargeGives the molecule a partial positive and

negative charge called a dipole

Covalent Bonds

Dipoles Symbol: Lower case Greek Delta (δ) Means “partial” δ+ stands for the positive end

of the molecule δ- stands for the negative

end of the moleculeTHIS IS DOES NOT MEAN THEBOND IS IONIC! This just show where the electron is mostly

likely to be located!

Important!

Page 12: Covalent Bonds. Form when two or more non-metal atoms SHARE electrons. There is no transfer of electrons

Properties of Covalent Substances

Soft Poor conductors of heat Poor conductors of electricity

There are no charged particles – no ions Low melting and boiling points due to weak

attraction between molecules Low solubility in water Can be liquid, solid or gas

Bonding. Ionic Bonds: Formed between ions. Transfer of electrons occurring. Covalent Bonds: Molecules form between atoms that share electrons. Metallic

Covalent compounds Covalent compounds are formed when non-metal atoms react together. As these atoms come near their outer electrons are attracted to the

Types of Chemical Bonds (what holds atoms together): Covalent – sharing electrons between non metal atoms to form molecules. Nonpolar – equal sharing

COVALENT BONDING. COVALENT BONDS Covalent bonds = Sharing electrons Octet rule: Atoms still need to become stable by having 8 electrons in their outer

Chapter 8 Covalent Bonding. The Covalent Bond Atoms will share electrons in order to form a stable octet. l Covalent bond : the chemical bond that results

Chapter 8 Covalent Compounds. Covalent Bonds Sharing Electrons –Covalent bonds form when atoms share one or more pairs of electrons nucleus of each atom

Covalent Bonding Unit 8 Notes Covalent Bonding Atoms gain stability when they share electrons and form covalent bonds. Lower energy states make an atom

CHAPTER 8 Covalent Bonding Why do Atoms Bond? Atoms gain stability when they share electrons and form covalent bonds. Lower energy states make an

Ch. 8 Covalent Bonding 8.1 Molecular Compounds. I. Molecules A. Neutral groups of atoms joined by covalent bonds B. Covalent bonds: atoms share electrons

Covalent Bonding Chapter 8 1. 8.1 Molecular Compounds Covalent Bond are atoms held together by sharing electrons. Molecule is a neutral group of atoms

Covalent bonding results when electrons are shared between non-metal atoms to form a molecule

Chapter 6.2 and 6.5 Covalent Compounds. Covalent Bonds Sharing Electrons –Covalent bonds form when atoms share one or more pairs of electrons nucleus

COVALENT BONDING Chapter 9. THE COVALENT BOND Remember that atoms bond to gain stability, usually meaning an octet of electrons. Sometimes atoms who

COVALENT BONDS & MOLECULAR STRUCTURE. CHEMICAL BONDS Form between atoms resulting in molecules (covalent bonds, sharing of electrons). Form between ions

Notes 5-3 Covalent Bonds + - + -. COVALENT BOND A force that bonds two atoms together by a sharing of electrons Each pair of shared electrons creates

Covalent Bonding. Molecule: neutral group of atoms that are held together by covalent bonds Covalent Bond: sharing of electrons between two atoms, “owned”

Chapter9 Covalent BondingCovalent bonding involves sharing of electrons to achieve noble gas configurations for the atoms involved Covalent bond = attractive force resulting from atoms

Covalent Compounds. Covalent Bonds Atoms of two nonmetals combined Held together by sharing electrons “co” means cooperate/share “valent” refers

Chapter 7-2 Covalent Bonding. Covalent Bonds Electrons are shared between two atoms Atoms with covalent bonds are called molecules Anything made of molecules

Basic Concepts in Bonding Covalent Bonding Atoms share electrons in covalent bonds, forming a molecular compound. Covalent bonding occurs between two

Chapter 6 Covalent Compounds. 6.1 Covalent Bonds Sharing Electrons Covalent bonds form when atoms share one or more pairs of electrons nucleus of

Covalent Chemical Bonds The electronic structures of atoms and molecules have many features in common. Individual atoms often possess unpaired electrons

Covalent Compounds. result from the sharing of electrons between two atoms ◦ A two-electron bond in which the bonding atoms share the electrons A

Chapter 8: Covalent Bonding - Norwell High School€¦ · Chapter 8: Covalent Bonding 8.1 The Covalent Bond Main Idea: Atoms gain stability when they share electrons and form covalent

IB BIOLOGY. Atoms form molecules/compounds Bonds: covalent (atoms share electrons) or ionic (atoms give/receive electrons). H - Hydrogen C - Carbon Na

Chapter 9 Chemical Bonding · Covalent bonds are formed when atoms share electrons. If the atoms share 2 electrons (a pair) a single covalent bond is formed. If the atoms share 4

Chapter 6.2 Notes. Sharing Electrons 1. Sharing Electrons a. A covalent bond is a chemical bond in which two atoms share a pair of valence electrons

Chemistry Basics -Part Two. Covalent Bonds Can Be Nonpolar Or Polar… Remember that covalent bonds occur between atoms that share electrons. There are

Covalent Bonds Why do atoms bond? Atoms want noble gas configuration (octet) For ionic bonds there is a transfer of electrons to get an octet of electrons

Covalent Compound Notes Why do atoms bond? Atoms gain stability when they share electrons and form covalent bonds. Lower energy states make an atom more

Covalent bonding Covalent bond: A chemical bond formed when two atoms share electrons

Covalent bonding. Group IV atoms Group IV atoms do not lose or gain electrons in order to obtain the octet structure. They prefer to share electrons with

Covalent & Metallic BondingCovalent Bonding Covalent bond – attraction between two atoms because they SHARE electrons In a covalent bond, atoms will SHARE electrons to fill their

Covalent Bonding Section 4.2. Covalent Bonds Sharing Electrons –Covalent bonds form when atoms share one or more pairs of electrons nucleus of each atom

Chapter 9 Covalent Bonding. I. The Covalent Bond A. Why do atoms bond? When two atoms need to gain electrons, they can share electrons to acquire a noble-

covalent bonds. form when two or more non-metal atoms share electrons. there is no transfer of...

Documents

polar covalent bonds

covalent bonds dipoles

atom slide

ionic slide

dipole slide

high electronegativity

highest electronegativity

types of chemical bonds