The Plum Pudding or Raisin Bun Model

Slides:

Advertisements

Similar presentations

From Philosophical Idea to Scientific Theory

Advertisements

Our current class model of the atom John Dalton’s Model element Molecule/compound Element/molecule All matter is made of atoms Smallest form of matter.

Atomic Structure. What is an Atom? The smallest part of an element.

The History of the Atom.

The Law of Conservation of Mass

Unit IV: Nature of Matter Lesson 1 Atomic Theories.

Chapter 4: Discovery of Atomic Structure. Prentice Hall © 2003Chapter 2 The Discovery of Atomic Structure An ancient Greek named Democritus was the first.

Part I. Leucippus and Democritus (460 to 370 BC) – believed that all matter was made up of tiny particles called atoms. Aristotle (384 to 322 BC) – believed.

J.J. Thomson His model of the atom.

The Story of the Atom History and Other Early Stories.

Atomic Structure mistry/Further_Understanding_of_the_Atom.

The Atomic Theory 1.Atomic Theory Matching 2.Atom Size 3.Democritus 4.Dalton – Ball Model 5.J.J. Thompson – Raisin Bun Model 6.Rutherford – Gold Foil Experiment.

Atom : The smallest particle of an element that keeps all the properties of that element. Lesson: Old Dead Guys.

O We use models to help us understand things that are too: BIG small Fast s l o w or complicated to see in “real life”

Ch 3 Atomic Theory Models of the Atom

The History of the Atom Democritus to Rutherford.

Atomic Structure Section 4-1. Democritus Greek philosopher 4 th Century BC First to come up with “atom”. Matter is composed of tiny particles called atoms.

Atomic Structure. Early Theories of Matter Democritus ( BCE) Democritus ( BCE) Greek philosopher Greek philosopher First to propose the.

Section 4.2 Defining the atom. The Atom What we know now: Definition: Atoms are the smallest particle of an element that retains the properties of that.

 Democritus (~400 BC) Greek philosopher who proposed that matter was made of tiny individual particles called “atomos” Believed atoms were indivisible.

Atomic Structure- Ch 4. Daltons Atomic Theory 1. All elements are composed of tiny indivisible particles called atoms. 2. Atoms of the same element are.

Atomic Structure.

Discovery of the Electron

1803 John Dalton Father of the Modern Atomic Theory

Unit IV: Nature of Matter

Atomic Theory “History of. . . ”.

Atomic Theory Label the 3 different particles that make up an atom

Scientists and Their Contribution to the Model of an Atom

The evolution of the atom

1803 Key words John Dalton Father of the Modern Atomic Theory.

Origin of the idea of atom…

Atomic Structure Democritus Evolution of Atomic theory Dalton

Atomic Structure Structure of the Nuclear Atom

Thomson and Rutherford’s contributions to the model of the atom

Atomic Theory and Developing an Atomic Model

Unit 2: Atomic Theory & Structure

The Atomic Theory Atomic Theory Matching Atom Size Democritus

History of the Atom.

1.3 History of the Atom Objectives 3:a,c,d; 5

Warm-Up Draw a picture of an atom. Be as specific as you can!

Dalton, Thomson and Crookes

ATOMIC HISTORY & ISOTOPES

Early Atomic Theory How the atom came to be.

Chapter 3- Atomic Structure

Questions to answer: 1) What were the ancient elements?

History of the Atom.

Atomic Structure Ch. 4.

Riley Castille, Allyssa Dwyer, Keni Richard

UNDERSTANDING THE PROPERTIES OF ELEMENTS

By: Manny Gill, and Harmandeep Gill

ATOMIC STRUCTURE S.MORRIS 2006.

Scientists and Their Contribution to the Model of an Atom

Scientists and Their Contribution to the Model of an Atom

The Structure of the Atom and the Periodic Table

Chapter 4: Atomic Structure

Research Hypothesis Theory An educated guess based on an observation

Early History of the Atom

4.1 & 4.2 Early Theories & Subatomic Particles

4.1 Studying Atoms Democritus believed that all matter consisted of extremely small particles. Democritus called these particles atomos (Greek for atoms)

John Dalton (b. Sept. 6, 1766, d. July 27, 1844)

Atomic Structure

Atomic Theory The idea that matter is made up of atoms, the smallest pieces of matter.

Aim: What is the structure of the Atom?

The Atomic Theory Atomic Theory Matching Atom Size Democritus

Honors Coordinated Science II Wheatley-Heckman

Atomic Model Timeline.

Presentation transcript:

The Plum Pudding or Raisin Bun Model J.J. Thomson The Plum Pudding or Raisin Bun Model

one indivisible sphere. The Problem… Dalton Model Matter consists of tiny particles, atoms The Particles are indestructible Atoms of each element have a different mass Atoms react and combine in simple whole number ratios Atoms are one indivisible sphere.

The Design… Cathode ray tube Electrometer Magnets

The Experiment & Evidence Actually there were three 1) Using the cathode ray tube and the electrometer, no charge was indicated unless the ray was deflected towards the electrometer The charge is a property of the ray.

The Experiment & Evidence 2) Using the cathode ray tube and magnets, he deflected the ray The deflection direction indicates a negative charge.

The Experiment & Evidence 3) Thomson measures the mass-to-charge ratio of the rays by measuring how much it is deflected by the magnetic field & how much energy it carried The ratio is 1,000 times smaller than that of the H+, these particles have less mass then the lightest atom known.

The New Model… Suggested a sphere of positive matter “Corpuscles” = negative charge Positioned in the Positive matter by electrostatic forces A jigsaw of smaller pieces Making up the atom

Bibliography http://www.chemheritage.org/classroom/chemach/atomic/thomson.html, retrieved June 15, 2009 http://nobelprize.org/nobel_prizes/physics/laureates/1906/thomson-bio.html http://www.atomicarchive.com/Bios/Thomson.shtml http://en.wikipedia.org/wiki/J._J._Thomson Images: www.makingthemodernworld.org.uk/.../IC.026/ https://reich-chemistry.wikispaces.com/file/view/348px-Plum_pudding_atom_svg.png http://www.welsch.com/gallery/bitmap/Rosinenkuchen_nach__Thompson_077.jpg prl.aps.org/.../te6?height=600%3B&width=500%3B http://www.chemheritage.org/EducationalServices/webquest/dalton.htm www.aip.org/history/electron/jjcrooke.htm www.manep.ch/.../nanotubes.html