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 ID: 774887
Download Presentation The PPT/PDF document " Atoms and Atomic Theory Essential Quest..." is the property of its rightful owner. Permission is granted to download and print the materials on this web site for personal, non-commercial use only, and to display it on your personal computer provided you do not modify the materials and that you retain all copyright notices contained in the materials. By downloading content from our website, you accept the terms of this agreement.
Slide1
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?
Slide2Objectives
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.
Slide3Agenda
Bell Ringer
Atoms PowerPointInteractive Notebook NotesThink-Pair-ShareBrain Pop: Atomic TheoryGallery Walk ActivityIndependent Practice
Slide4Atoms
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.
Slide5Atomic Structure
There are two basic components in every atom:
Electron CloudNucleus
Slide6Subatomic Particles
Three subatomic particles make up every atom:
Subatomic Particle
ChargeLocationProtonPositive (+)Nucleus or “Core”NeutronNo Charge (0)Nucleus or “Core”ElectronNegative (-)Electron Cloud
Slide7Subatomic Particles
Electron Cloud:
Electrons
orbit the nucleus.
Nucleus or “Core”:Protons and Neutrons are found in the nucleus.
Slide8Atomic Theory
Changes over time…
Slide9Atomic 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.
Slide10Atomic Theory Timeline
Scientist
InformationModelJohn DaltonAll matter is made of atoms. Atoms are too small to see, indivisible and indestructible. All atoms of a given element are identical.
Slide11ScientistInformationModelJ.J ThompsonDiscovered the negative electron, and predicted that there also must be a positive particle to hold the electrons in place.
Atomic Theory Timeline
Slide12ScientistInformationModelErnest RutherfordDiscovered the nucleus of an atom and named the positive particles in the nucleus “protons”. Concluded that electrons are scattered in empty space around the nucleus.
Atomic Theory Timeline
Slide13ScientistInformationModelJames ChadwickDiscovered that neutrons were also located in the nucleus of an atoms and that they contain no charge.
Atomic Theory Timeline
Neutrons
Slide14Atomic Theory Timeline
Scientist
InformationModelNeils BohrConcluded that electrons are located in planet-like orbits around the nucleus in certain energy levels.
Slide15ScientistInformationModel(Many Scientists!)The Modern Atomic TheoryElectrons do not orbit the nucleus in neat planet-like orbits but move at high speeds in an electron cloud around the nucleus.
Slide16Think-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.
Slide17http://www.brainpop.com/science/matterandchemistry/atomicmodel
/
Slide18Atoms 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?
Slide19Three states of matter
solid
liquid
gas
At room temperature most substances exist in one of three physical states.
Slide20Slide21Solids
The particles in a solid are
very tightly packed and vibrate in place. Solids have a definite volume and shape.
Slide22Particles in a solid – animation
Slide23Liquids
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!
Slide24Particles in a liquid – animation
Slide25Gases
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 a container, it fills up the entire container and spreads out as far as possible.
Slide26Particles in a gas – animation
Slide27Molecular Motion
Adding heat
Removing heat
Slide28In 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.
Slide29Independent Practice