Flame Test ActivityOctober 19, 2010

andrewpaladie.wordpress.com

Figuring out what things are made of

Scientists want to know what elements are in different samples.

Figuring out what things are made of

Scientists want to know what elements are in different samples. Which sample is sodium chloride?

Figuring out what things are made of

Scientists want to know what elements are in different samples. Which sample is sodium chloride?

Sodium chloride

Magnesium chloride

Figuring out what things are made of

Scientists want to know what elements are in different samples. Which sample is sodium chloride?

What is the Sun made of?

Sodium chloride

Magnesium chloride

http://en.wikipedia.org/wiki/Sun

Properties of Light

Light is a form of energy.

quarknet.fnal.gov

Electromagnetic Radiation Spectrum

Properties of Light

Light is a form of energy.

Visible light behaves both like a wave and a particle.

Properties of Light

Light is a form of energy.

Visible light behaves both like a wave and a particle.

Let’s meet Roy G. Biv.

centuriogroup.wordpress.com

Properties of Light

Light is a form of energy.

Visible light behaves both like a wave and a particle.

Let’s meet Roy G. Biv.

Distance covered

Properties of Light

Light is a form of energy.

Visible light behaves both like a wave and a particle.

Let’s meet Roy G. Biv.

Low frequency

High Frequency

Low energy

High energy

Excitation of Electrons

We can think of electron configurations in terms of energy.

Excitation of Electrons

We can think of electron configurations in terms of energy.

Let’s make the energy diagram for sodium (Na)

Excitation of Electrons

Let’s make the energy diagram for sodium (Na)

Excitation of Electrons

Let’s make the energy diagram for sodium (Na)

Excitation of Electrons

Let’s make the energy diagram for sodium (Na)

Excitation of Electrons

Let’s make the energy diagram for sodium (Na)

Excitation of Electrons

Let’s make the energy diagram for sodium (Na)

Excitation of Electrons

Let’s make the energy diagram for sodium (Na)

Excitation of Electrons

Let’s make the energy diagram for sodium (Na)

Excitation of Electrons

Let’s make the energy diagram for sodium (Na)

Excitation of Electrons

Let’s make the energy diagram for sodium (Na)

Excitation of Electrons

Let’s make the energy diagram for sodium (Na)

Excitation of Electrons

Let’s make the energy diagram for sodium (Na)

GROUND STATE

Excitation of Electrons

Ground State

Excited State

Excitation of Electrons

Excitation of Electrons

Some atoms release this energy in the form of visible light!

Flame Test Demo

Each element has a specific way in which their electrons are excited upon heating.

This means each element gives off different colors when the electrons are returning to the ground state after being heated.

Now we have a way to identify different elements!Sample