Simple molecules LO: Describe the properties of substances made from simple molecules. (D) Explain...

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Simple molecules LO: Describe the properties of substances made from simple molecules. (D) Explain how covalent bonds are strong, but simple molecules have low melting points. (C) Explain why simple molecules have particular properties (B) Explain the differences in properties of simple molecules which occurs even though covalent bonding is strong (A/A*)

Transcript of Simple molecules LO: Describe the properties of substances made from simple molecules. (D) Explain...

Page 1: Simple molecules LO: Describe the properties of substances made from simple molecules. (D) Explain how covalent bonds are strong, but simple molecules.

Simple moleculesLO:

Describe the properties of substances made from simple molecules. (D)

Explain how covalent bonds are strong, but simple molecules have low melting points. (C)

Explain why simple molecules have particular properties (B)

Explain the differences in properties of simple molecules which occurs even though covalent bonding is strong (A/A*)

Page 2: Simple molecules LO: Describe the properties of substances made from simple molecules. (D) Explain how covalent bonds are strong, but simple molecules.

Make these models

HCl

H2O

CH4

C2H6

CO2

CH3CH2OH

Carbon

Hydrogen

Oxygen

Chlorine

Single bond

Double bond

Page 3: Simple molecules LO: Describe the properties of substances made from simple molecules. (D) Explain how covalent bonds are strong, but simple molecules.

Covalent compounds

Water Sulphur

Ethanol

IodineWhat do these substances have that is similar ?

What tests for properties could you do ?

Page 4: Simple molecules LO: Describe the properties of substances made from simple molecules. (D) Explain how covalent bonds are strong, but simple molecules.

Covalent bonds are stronger than ionic bonds…..FACT !

Page 5: Simple molecules LO: Describe the properties of substances made from simple molecules. (D) Explain how covalent bonds are strong, but simple molecules.

Practical

WEAR GOGGLES

STAND UP

REPORT ALL SPILLS AND BREAKAGES

Using a boiling tube and a thermometer find out…

-The temperature that the wax melts at.

-The temperature that the water boils at.

-Record your results.

Page 6: Simple molecules LO: Describe the properties of substances made from simple molecules. (D) Explain how covalent bonds are strong, but simple molecules.

Conductivity demo

Wax

Ethanol

Ammonia

Say why covalent molecules do not conduct electricity

Page 7: Simple molecules LO: Describe the properties of substances made from simple molecules. (D) Explain how covalent bonds are strong, but simple molecules.

Covalent compounds do not conduct electricity because….There are no electrical charges to carry the electricity

Page 8: Simple molecules LO: Describe the properties of substances made from simple molecules. (D) Explain how covalent bonds are strong, but simple molecules.

Melting and Boiling

I said that covalent bonds are stronger than ionic.

If this is the case why do many covalent compounds have very low melting and boiling points ?

Page 9: Simple molecules LO: Describe the properties of substances made from simple molecules. (D) Explain how covalent bonds are strong, but simple molecules.

Covalent bonds are strong, but each molecule is separate to its neighbour.

The forces between each MOLECULE is very small.

There are weak intermolecular forces.

Page 10: Simple molecules LO: Describe the properties of substances made from simple molecules. (D) Explain how covalent bonds are strong, but simple molecules.

Make a statement

About covalent bonding.

The rest of the class will have to decide if it is true or false.

Page 11: Simple molecules LO: Describe the properties of substances made from simple molecules. (D) Explain how covalent bonds are strong, but simple molecules.

Write a Question

About anything to do with chemistry that we have done so far.

Page 12: Simple molecules LO: Describe the properties of substances made from simple molecules. (D) Explain how covalent bonds are strong, but simple molecules.

Simple ____________ do not conduct _____________ because there are no __________ on the molecule. They have very weak ___________ between molecules and are usually found as ___________ or gases. When they do form ____________ they are __________ and not __________. They do not dissolve in ____________ but can ___________ in other liquids.forces hard charges solids dissolve water molecules liquids electricity waxy

Page 13: Simple molecules LO: Describe the properties of substances made from simple molecules. (D) Explain how covalent bonds are strong, but simple molecules.
Page 14: Simple molecules LO: Describe the properties of substances made from simple molecules. (D) Explain how covalent bonds are strong, but simple molecules.
Page 15: Simple molecules LO: Describe the properties of substances made from simple molecules. (D) Explain how covalent bonds are strong, but simple molecules.
Page 16: Simple molecules LO: Describe the properties of substances made from simple molecules. (D) Explain how covalent bonds are strong, but simple molecules.

Molecules. Objectives Write the electron dot structure for an atom. Explain how covalent bonds form molecules.

Molecules. Objectives Write the electron dot structure for an atom. Explain how covalent bonds form molecules.

CHAPTER 1--COVALENT BONDING AND SHAPES OF MOLECULES

CHAPTER 1--COVALENT BONDING AND SHAPES OF MOLECULES

Chapter 6 -Covalent compounds Section 2 - Drawing and Naming Molecules

Chapter 6 -Covalent compounds Section 2 - Drawing and Naming Molecules

Shapes of covalent molecules

Shapes of covalent molecules

Ionic/Covalent Compounds Characteristics & Counting Atoms/Molecules.

Ionic/Covalent Compounds Characteristics & Counting Atoms/Molecules.

C5 simple covalent-bonding

C5 simple covalent-bonding

Chapter 6 Chemical Bonding Covalent molecules

Chapter 6 Chemical Bonding Covalent molecules

Ionic and Covalent Compounds. How do ionic and covalent compounds compare? Ionic compounds make formula units Covalent compounds make molecules.

Ionic and Covalent Compounds. How do ionic and covalent compounds compare? Ionic compounds make formula units Covalent compounds make molecules.

The Shape of Covalent Molecules

The Shape of Covalent Molecules

BONDING. Bonds Between Atoms Covalent Ionic Molecules Network Metallic.

BONDING. Bonds Between Atoms Covalent Ionic Molecules Network Metallic.

Covalent Bonding and Simple Molecular Compoundsjsmith.cis.byuh.edu/...to.../s07-covalent-bonding-and-simple-mo.pdf · This is “Covalent Bonding and Simple Molecular Compounds”,

Covalent Bonding and Simple Molecular Compoundsjsmith.cis.byuh.edu/...to.../s07-covalent-bonding-and-simple-mo.pdf · This is “Covalent Bonding and Simple Molecular Compounds”,

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

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

Mrs C’s Chem Lecture. H bonds: weak attraction between polar covalent molecules Van der Waals: very weak attraction between nonpolar covalent molecules.

Mrs C’s Chem Lecture. H bonds: weak attraction between polar covalent molecules Van der Waals: very weak attraction between nonpolar covalent molecules.

Covalent Capture DOI: 10.1002/anie.200803583 Covalent ...Organic chemistry is founded on covalent synthesis, that is, the formation of covalent bonds between molecules by the reaction

Covalent Capture DOI: 10.1002/anie.200803583 Covalent ...Organic chemistry is founded on covalent synthesis, that is, the formation of covalent bonds between molecules by the reaction

Molecules and Covalent Bonding

Molecules and Covalent Bonding

Biologically Important Molecules. I.Water Biologically Important Molecules I.Water A. Structure - polar covalent bonds.

Biologically Important Molecules. I.Water Biologically Important Molecules I.Water A. Structure - polar covalent bonds.

Covalent Molecules and Lewis Structures - MEGA … · 2016-09-02 · Covalent Molecules and Lewis Structures Time required: two 50-minute periods ... Covalent Bonding and Lewis Structures

Covalent Molecules and Lewis Structures - MEGA … · 2016-09-02 · Covalent Molecules and Lewis Structures Time required: two 50-minute periods ... Covalent Bonding and Lewis Structures

Simple molecules

Simple molecules

What will be the shapes of the following covalent molecules?

What will be the shapes of the following covalent molecules?

Bonding: Intermolecular Forces. Covalent Bonds Covalent bonding leads to two types of molecules Giant Structures Eg. Diamond, sand Strong covalent bonds.

Bonding: Intermolecular Forces. Covalent Bonds Covalent bonding leads to two types of molecules Giant Structures Eg. Diamond, sand Strong covalent bonds.