Atoms and atomic theory
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Atoms and Atomic Theory. Essential Questions: How and why has the Atomic Theory changed over time? How can we describe the molecular motion of the states of matter? . Objectives. Students will explain that atoms are the smallest unit of an element and are composed of subatomic particles.

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Atoms and Atomic Theory

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Atoms and atomic theory

Atoms and Atomic Theory

Essential Questions: How and why has the Atomic Theory changed over time? How can we describe the molecular motion of the states of matter?


Objectives

Objectives

  • Students will explain that atoms are the smallest unit of an element and are composed of subatomic particles.

  • Students will analyze models of the scientific theory of atoms.

  • Students will analyze models and describe the motion of particles in solids, liquids, and/or gasses.


Agenda

Agenda

  • Bell Ringer

  • Atoms PowerPoint

    • Interactive Notebook Notes

    • Think-Pair-Share

  • Brain Pop: Atomic Theory

  • Gallery Walk Activity

  • Independent Practice


Atoms

Atoms

  • Matter is anything that takes up space and has mass. All matter is made of atoms.

  • Atoms are the basic building blocks of matter. They make up everything around us; Your desk, the board, your body, everything is made of atoms!

  • Atoms are too small to see without powerful microscopes.


Atomic structure

Atomic Structure

There are two basic components in every atom:

Electron Cloud

Nucleus


Subatomic particles

Subatomic Particles

Three subatomic particles make up every atom:


Subatomic particles1

Subatomic Particles

  • Electron Cloud:

  • Electrons orbit the nucleus.

  • Nucleus or “Core”:

  • Protons and Neutrons are found in the nucleus.


Atomic theory

Atomic Theory

Changes over time…


Atomic theory1

Atomic Theory

  • Because we can not see atoms, we use models to teach and learn about atoms.

  • The atomic theory has changed over time as new technologies have become available.

    • Remember: Scientific knowledge builds on past research and experimentation.


Atomic theory timeline

Atomic Theory Timeline


Atomic theory timeline1

Atomic Theory Timeline


Atomic theory timeline2

Atomic Theory Timeline


Atomic theory timeline3

Atomic Theory Timeline

Neutrons


Atomic theory timeline4

Atomic Theory Timeline


Think pair share

Think-Pair-Share!

Take a minute to read the essential question as I read it aloud: “How and why has the Atomic Theory changed over time?”

After you have jotted down your notes in the space on your guided notes, exchange your thoughts with your partner. We will have share-outs and discuss the answer.


Atoms and atomic theory

http://www.brainpop.com/science/matterandchemistry/atomicmodel/


Atoms and atomic theory1

Atoms and Atomic Theory

Essential Questions: How and why has the Atomic Theory changed over time? How can we describe the molecular motion of the states of matter?


Three states of matter

Three states of matter

At room temperature most substances exist in one of three physical states.

gas

liquid

solid


Solids

Solids

  • The particles in a solid are very tightly packed and vibrate in place.

  • Solids have a definite volume and shape.


Particles in a solid animation

Particles in a solid – animation


Liquids

Liquids

  • The particles in a liquid are close together but can move and flow past one another.

  • Liquids have a definite volume but they do not have a definite shape. This is why liquids like water take the shape of the container they are in.

Picture was taken at the exact moment these water balloons were popped!


Particles in a liquid animation

Particles in a liquid – animation


Gases

Gases

  • Particles in a gas have higher amounts of energy than those in a solid or liquid.

  • Gases do not have a definite shape or volume. When placed in acontainer, it fills up the entire container and spreads out as far as possible.


Particles in a gas animation

Particles in a gas – animation


Molecular motion

Molecular Motion

Adding heat

Removing heat


Atoms and atomic theory

In your groups, you will rotate clockwise after 4 minutes through the 5 stations. You will write all information on the Gallery Walk handout.

  • Stay with your group at all times.

  • Do not move ahead or go back, wait for the timer to move.

  • You may discuss possible answers with your group members.

  • Raise your hand if you need assistance after you have asked your group members.


Atoms and atomic theory

Independent Practice


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