What do the following have in common?. Scientific Modeling Makes scientific concepts easier to understand or visualize by referencing common knowledge.

Slides:

Advertisements

Similar presentations

Atomic Theory Timeline

Advertisements

A History of the Atom A long time to study a little thing.

Atomic Theories.

The History of Atomic Theory A piece by piece progression through the structure of the atom.

History of the Atomic Model

Models of the Atom: A Historical Perspective

Atomic Theorists How we got to where we are now. Law of Conservation of Mass Matter can’t be created or destroyed Who: Antoine Lavoisier When: 1785 Where:

The History of Atomic Theory

History of the Atomic Theory

History of Atomic Theory

History of Atomic Theory 1

The History of Atomic Theory

The History of the Atom During all of history, there have been many different ideas about what an atom is (most of them incorrect). In the next unit we’ll.

The History of Atomic Theory

The History of Atomic Theory

9/10/12 Atom and the History of the Atom

History of the Atom Model

Chapter 5: Atomic Theory Mr. Albaugh

Development of our understanding of the atom. Early Models Democritus was first to suggest atom in 4 th century B.C. Believed matter was made of tiny.

The Development of the Atomic Theory

ATOMIC STRUCTURE. ATOM: smallest piece of an element. Atoms are TOO SMALL TO SEE with our eyes.Atoms are TOO SMALL TO SEE with our eyes. We must USE EVIDENCE.

1 This is Jeopardy Atomic Theory 2 Category No. 1 Category No. 2 Category No. 3 Category No. 4 Category No Final Jeopardy.

Introduction to Atoms Chapter 4.

Atomic Theory Timeline

Developing a Model of the Atom The History of Atomic Theory.

Atomic Structure. Way Early Theories Democritus ( BC) –First person to propose that matter is not infinitely divisible –Atomos –Matter is empty.

Atomic Theory: A Timeline More than 2000 years ago ancient philosophers had theories on matter BC - Democritus believed that matter was made of.

The Changing Models of the Atom

Atomic Theory 15,000 kilotons.  Dismissed idea of the atom. Early Greeks Two schools of thought:  Matter is made of indestructible particles called.

Back ©Bires, 2002 Slide – The Discovery of Atomic Structure AP Chemistry Summer Work Chapter 2 Anyone who says that they can contemplate quantum.

Models of the Atom a Historical Perspective simple atom structure atomic history song.

Early Atomic Models Democritus –World is made of two things: empty space and indivisible particles, called atoms –There are different atoms for every material.

What is an _________? The smallest particle of an ________ that is still an ________ _________ are the building blocks of all ___________.

ATOMS History - Part 1 - Early Theories Democritus and Leucippus = atomos theoryDemocritus and Leucippus = atomos theory Aristotle = 4 basic elements (earth,

Atomic Model History.

ATOMS PROJECT CKS ATOMISM Atomism is the theory that all the objects in the universe are composed of very small, indestructible building blocks. Atomism.

History of Atomic Structure. Ancient Philosophy Who: Aristotle, Democritus When: More than 2000 years ago Where: Greece What: Aristotle believed in 4.

History of the Atom Democritus Democritus: It was 400 BC when he came up with the idea that matter could not be divided indefinitely. This lead to the.

Prentice Hall Physical Science – Chapter 4

Law of Conservation of Mass Who: Antoine Lavoisier Matter can't be created or destroyed When: 1785 Where: France.

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

History of Atomic Models

History of the Atom 440 BC – Democritus and Leucippus developed the original atomic concept –There exist indivisible particles called atoms (“a” meaning.

Atomic Models From the ancient Greeks to the 20 th century.

History of the Atomic Model

Atomic Theory Chapter 4. Atomic Theory  Science is based off of observations.  A Scientific Law is a summary of what is seen in observations.  A Scientific.

Atomic Theory (Unit 8) Introduction. Atomic Theory Theories in science are proposed to explain the evidence available at the time. As new evidence is.

Atomos The History of Atomic Theory. Atomic Models A model uses ideas to explain facts A model can be changed as new information is collected.

The History of Atoms Not the history of the atom itself, but the history of the idea of the atom.

Brief History of Atomic Theory. 1 st atomic models In 400 BC, the model looked like a solid indivisible ball In 400 BC, the model looked like a solid.

1.3 Atomic Theory  Greek philosophers believed that matter was made of atomos that were the smallest pieces of matter.  Aristotle believed matter was.

Chemistry What is chemistry? –Chemistry is the study of matter, what it is made of, and how it changes. What is matter? –Matter is anything that… Has.

Development of the Atomic Theory Matter Unit. d=6B8E52B30643AEB849FBD9552FD102E9:1

Atomos: Not to Be Cut The History of Atomic Theory.

Atomic Theory Story of the Atom. Our Story Begins…. Many years ago 400 B.C. In a land far away.

Atomos: Not to Be Cut The History of Atomic Theory.

+ ATOMIC THEORY. + Democritus Atom He was said to be the first step toward the current atomic theory. Hypothesized all matter is composed of tiny particles.

Who are these men?.

DEVELOPMENT OF THE ATOMIC THEORY Atom- smallest particle into which an element can be divided and still be the same substance Called the building blocks.

Atomic Theorists, Theories and History. Which law states the mass of the reactants must equal the mass of the products? 1.Law of conservation of mass.

The Changing Model of the Atom. Aristotle 400 BCE claimed that there was no smallest part of matter different substances were made up of different proportions.

Atomic Theory and the Atomic Model. Objectives Describe evidence that Greek philosophers used to develop the idea of atoms. Distinguish between a scientific.

Atomic Theory Timeline

History of the Atom.

The History of Atomic Theory

Presentation transcript:

What do the following have in common?

Scientific Modeling Makes scientific concepts easier to understand or visualize by referencing common knowledge Can you think of any scientific models?

Scientific Models

Models of the Atom

History of the Atom

Jigsaw Activity Number off 1-5 (4 groups of 5, 1 group of 6) Each group will be responsible for a section of the atomic theory from Hebden p As a group, you must fully understand your section because each member will be teaching it to the rest of the class individually

Jigsaw Activity Group A: each member will teach the rest of the class about “Early Models of the Atom” Group B: each member will teach the rest of the class about “Dalton’s Atomic Theory” Group C: each member will teach the rest of the class about “The Thomson Model” Group D: each member will teach the rest of the class about “The Rutherford Model” Group E: each member will teach the rest of the class about “The Bohr Model"

Jigsaw Activity 10 min to read & make notes on the section you’re responsible for Then, all the 1s, 2s, etc. will form groups and teach new group members about their section (like piecing together a jigsaw puzzle) Each member presents 2 min on their topic starting with group A

Early Models of the Atom 5 th century BC - Leucippus & Democritus – Atoms are tiny, uncuttable particles – Properties are direct results of differences in size & shape of atoms

Early Models of the Atom 4 th century BC – Aristotle – Matter had no properties on its own – Properties came from different combinations – 4 elements: water, air, fire, earth

Dalton’s Atomic Theory Law of Definite Proportions E.g. 2/18 of the mass of H 2 O is always from H and 16/18 is from O Law of Multiple Proportions Compounds are made of atoms in whole number ratios E.g. H & O can make OH -, H 2 O, H 3 O +, H 2 O 2 Law of Conservation of Mass Mass of reactants = mass of products

Thomson’s Model of the Atom Discovered + and - particles in atoms Proposed “plum pudding” model: negatively charged raisins spread around positively charged bread

Rutherford Model of the Atom Gold Foil Experiment Fired alpha (He 2+ ) particles at thin gold foil Thomson model predicts minimal deflection of alpha particles b/c + charge spread out Rutherford found small fraction of particles w/ significant deflection Concluded + charges must be concentrated in a small area w/in atoms

Rutherford Model of the Atom

Bohr’s “Planetary” Model Electrons orbit around nucleus at specific energy levels Been disproven but many key ideas still apply to the modern model of the atom

Heisenberg’s “Cloud” Model Heisenberg’s Uncertainty Principle: σ x σ p ≥ ħ/2 The more precisely you know the position of an electron, the less precisely you know the momentum and vice versa Can’t know both at the same time so the position of electrons can only be in terms of probability