Part 02 covalent bonding and covalent compounds
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Part 02 Covalent Bonding and Covalent Compounds. 1.Covalent Bonding -two or more non metals -two or more semi metals -share at least one pair of valence electrons -all the atoms get a stable octet or in the case of hydrogen, a duet

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Part 02 Covalent Bonding and Covalent Compounds

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Part 02 covalent bonding and covalent compounds

Part 02Covalent BondingandCovalent Compounds


Part 02 covalent bonding and covalent compounds

1.Covalent Bonding

-two or more nonmetals

-two or more semimetals

-share at least one pair of valence electrons

-all the atoms get a stable octet

or in the case of hydrogen, a duet

- a molecule is formed. The sharing of valence electrons holds the atoms together


Part 02 covalent bonding and covalent compounds

2.Covalent Bonding Between Like Atoms:

The Diatomic Molecules

H

H

Lewis Dot Diagram

-shared pair belongs to both atoms

-each atom has a stable duet


Part 02 covalent bonding and covalent compounds

H

H

Structural Diagram

-dash represents one shared pair of valence electrons

-a single covalent bond

-formula, H20

-no charges, no electrons lost or gained

-name, dihydrogen, or just hydrogen

-shape or molecular geometry, linear


Part 02 covalent bonding and covalent compounds

Lewis Dot Diagram

F

F

-shared pair belongs to both atoms

-each atom has a stable octet


Part 02 covalent bonding and covalent compounds

Nonbonding electrons

F

F

Structural Diagram

Bonding electrons

-a single covalent bond

-formula, F20

-no charges, no electrons lost or gained

-name, difluorine, or just fluorine

-shape or molecular geometry, linear


Part 02 covalent bonding and covalent compounds

Nonbonding electrons

I

I

Structural Diagram

Bonding electrons

-all the other halogens bond the same way

-Cl2, Br2, I2 all with no charge


Part 02 covalent bonding and covalent compounds

O

O

O

O

No octets!

Unpaired electrons!

O

O

Lewis Dot Diagram


Part 02 covalent bonding and covalent compounds

O

O

Structural Diagram

-two dashes are two shared pairs of electrons, i.e., four electrons

-a double covalent bond

-all the other electrons are nonbonding electrons


Part 02 covalent bonding and covalent compounds

O

O

Structural Diagram

-formula, O20

-no charge, no electrons lost or gained

-name, dioxygen or just oxygen

-shape or molecular geometry, linear


Part 02 covalent bonding and covalent compounds

N

N

N

N

N

N

No octets!

Unpaired electrons!

N

N

No octets!

Unpaired electrons!

Lewis Dot Diagram


Part 02 covalent bonding and covalent compounds

N

N

Structural Diagram

-three dashes are three shared pairs of electrons, i.e., six electrons

-a triple covalent bond

-all the other electrons are nonbonding electrons


Part 02 covalent bonding and covalent compounds

N

N

Structural Diagram

-formula, N20

-no charge, no electrons lost or gained

-name, dinitrogen or nitrogen

-shape or molecular geometry, linear


Part 02 covalent bonding and covalent compounds

3.Summary: The Diatomic Molecules

a.Single Covalent Bonds

1)Hydrogen, H2

2)Fluorine, F2

3)Chlorine, Cl2

4)Bromine, Br2

4)Iodine, I2

b.Double Bond, Oxygen, O2

c.Triple Bond, Nitrogen N2

Assignment: Read p236-240


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