Stage 1 Chemistry Lesson 1

Stage 1 Chemistry Flipped learning

By Sarah Hemming

Chemistry definitions

Defintions

Materials

A material is any non-living chemical substance. Elements, compounds and mixtures are examples of materials. Materials have physical and chemical properties.

Physical property: something that you can observe and measure without changing the material

Physical

Chemical property: determined by transforming a material into another chemical substance or material

Chemical

Chemical vs Physical Properties

Example of Chemical Properties

In determining chemical properties, the chemical composition of the original substance is changed.

Chemical properties include;

◦Decomposition by heat

◦Effect of light

◦Reactions with water, acids, bases, oxygen and other substances

Melting Points

At melting point, materials transition from solids to liquids

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Boling Points

At boiling point, materials transition from liquids to gases.

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A solute is a substance that can be dissolved by a solvent to create a solution. A solute can come in many forms. It can be gas, liquid, or solid.

​Solute

The liquid in which a solute is dissolved to form a solution.

Solvent

Solvent and Solute

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Nanoparticles

Nanoparticles are nanomaterials consist of particles that are less than 100nm across.

Solubility

The ability for a solute to dissolve in a solvent is called its solubility and is typically measured in units of g/L.

Example of Physical Properties

-Melting point

-Boling point

-Hardness and density

-Thermal conductivity

-Electrical conductivity

-Solubility​

Density and Hardness

​Defintions

​Density is the number of grams in each cubic centimeter of a material. It describes how closely packed the particles are in a sample of material.

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Hardness is a measure of a substances resistance to being scratched.

The rate of this transfer of heat is known as the thermal conductivity.

Defintion

Thermal Conductivity

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​Electricity

Electricity is the flow of particles that have either a positive or negative electric charge

Subject | Subject

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Electrical conductors are materials that consist of “free-moving” electrically charged particles

Electrical conductors

Electrical conductivity is the measure of the amount of electrical current a material can carry or it's ability to carry a current

Electrical Conductivity

Electrical Conductivity

Multiple Choice

The boling point is ....

• When a solid turns to a liquid

• When a liquid turns to a gas

• When a liquid turns to a solid

Multiple Choice

The melting point is ....

• When a solid turns to a liquid

• When a liquid turns to a gad

• When a liquid turns to a solid

Open Ended

Identify the type of chemical particle in this image.

How big are they (size)?

Multiple Choice

Themal conductivity is

• Materials that consist of “free-moving” electrically charged particles

• The rate of this transfer of heat is known as the thermal conductivity

• Is the number of grams in each cubic centimeter of a material. It describes how closely packed the particles are in a sample of material.

• Materials transition from solids to liquids

Draw

Using the particle model show me how the particles change during boling

Draw

Using the particle model show me how the particles change during melting.

Multiple Choice

True of false

The solvent is often the solution the solute in dissovled in.

• True

• False