The Advent of Modern Atomic Theory Vocabulary: 1. theory 2. Democritus 3. science 4. John Dalton 5. Dalton’s model 6. Dalton’s atomic theory 7. Law of.

Slides:

Advertisements

Similar presentations

Chapter 3 Atoms: The Building Blocks of Matter 3.1 The Atom:

Advertisements

The Building Blocks of Matter

Chapter 3.1. Objectives 1. Explain the law of mass, the law of definite proportions, and the law of multiple proportions 2. Summarize the five essential.

Atomic Theory History of Atom Early Greeks believed that matter consisted of tiny particles – they called the “atoms”

The ancient Greeks tried to explain matter, but the scientific study of the atom began with John Dalton in the early 1800s. Section 1: Early Ideas About.

Chapter 2 Atoms. Greek philosopher, Democritus fifth century B.C., coined term atom, as particles that can not be cut or broken up further.

History of Atomic Theory

Early Early Atomic ideas 400 BC, Democritus – said world was made up of two things air and a basic particle called an atom. Atom was the smallest piece.

Atoms: The Building Blocks of Matter The Atom: From Philosophical Idea to Scientific Theory.

Atomic Theory History of Atom Early Greeks believed that matter consisted of tiny particles – they called the “atoms”

Chapter 3 Atoms and Atomic Structure Write the bullets that are in black font.

History of the Atomic Theory. Law of Definite Proportions A given compound contains the same elements in exactly the same proportions by mass, regardless.

Atoms and Elements Mr. Olsen 7 th Grade Integrated Science.

Unit 2: Atomic Theory and Structure. (c. 400 B.C.) Democritus proposed that “atomos” are indivisible. Atom: smallest particle of matter that retains its.

The History of the Atom…. went against, Aristotle, who believed that matter was composed of four qualities: earth, fire, air and water all matter is composed.

Chapter 4: Atoms and Elements.  Recognize that all matter is composed of atoms.  Explain the early ideas that led to the current understanding of the.

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Table of Contents Chapter 3 Atoms: The Building Blocks of Matter.

Chapter 4 The Structure of the Atom. Section 4.1 Early Ideas About Matter.

Atomic Structure. 1. Democritus: Around 300 BC, a Greek philosopher, Democritus stated that everything is made up of tiny, invisible particles He said.

The Modern Nuclear Atom How did our concept of the atom come about, and how did it develop?

Chapter 2. Ancient Greek and Roman concepts of Nature 1. Continuists – Aristotle 2. Atomists – Leucippus, Democritus & Lucretious Dark & Middle Ages –

standard: i & e (1n) terms: 87 article: 90 & 110 mastering concept: 112(29-33) Homework Cornell notes: 4.1 sec. assessment: 91(1-4) 1.

OUTLINE of TOPICS 1. The Story of Atom 2. Subatomic Particles 3. J.J. Thomson 4. Milikan Middle School 5. E. Rutherford 6. The Periodic Table 7. Counting.

Lesson 2.1 – Atomic Structure History of the Atom.

Atomic Structure PSC Chapter 3. Atomic Theory of Matter Evidence of atoms Law of Definite Proportions Law of Conservation of Mass Law of Multiple Proportions.

Matter: anything that has a mass BUT…. What is matter made up of?

Chapter 3 Lesson Starter Young people should not smoke.

Development of the atomic theory. Important laws Law of conservation of mass – Mass is neither created or destroyed during ordinary chemical reactions.

Atoms and Their Structure Early Greek Theories 400 B.C. - Democritus crushed substances in400 B.C. - Democritus crushed substances in his mortar and.

The Building Blocks of Matter. Objectives Recognize that science is a progressive endeavor that reevaluates and extends what is already known. (SPI 3221.

Atoms & Their Structure Chapter 2 Section 1 Part 1.

 Objectives: ◦ Explain  The law of conservation of mass  The law of definite proportions  The law of multiple proportions ◦ Summarize the 5 points.

Chemical Foundations: Elements, Atoms, and Ions Atoms & Compounds.

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

 Suggested Reading pgs Pages Chapter 3, Section 1 - Atoms STM (scanning tunneling microscope) image of a single zigzag chain of cesium.

Section 1 The Atom: From Philosophical Idea to Scientific Theory

Dalton’s Atomic Theory. Law of Conservation of Mass The total mass of materials after a chemical reaction is the same as the total mass before the reaction.

1 History – Democritus to Dalton Mr. ShieldsRegents Chemistry U01 L01.

Atoms: PAGE 37 OF INB. Essential Question  How are Dalton’s atomic theory and modern atomic theory similar and different?

3-1 Early Models of the Atom. Atoms? ► The Greek Philosopher Democritus  Proposed that all matter is made up of small indivisible particles  Called.

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.

Chapter 2.1 The Atomic Theory of Matter. The History of the Atom Greek philosophers in 450 BC Atomos- invisible particles Plato and Aristotle No invisible.

ATOMIC THEORY Philosophical Idea to Scientific Theory Chapter 3 Section 1.

The Atom CHAPTER 3.1 MS. COX’S CHEMISTRY CLASS. Lesson Objectives Explain the law of conservation of mass, the law of multiple proportions and the law.

Atomic Structure.  Democritus (460 BC – 360 BC)  Ancient Greek philosopher ▪ No experiments performed!  Major Contribution: The Atom ▪ He proposed.

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu The activity 1.Break into your groups and move the desks out of the.

Atomic Theory ScientistExperimentContributionAtomic Model Democritus (ca 400 BCE ) (thought)atomos = indivisible particle ‘grains of sand’

From Philosophical Idea to Scientific Theory

Ch. 3 – Atoms: The Building Blocks of Matter

Section 3.1. Atomic Theory  400 BC – Democritus  Coined the term atom from the Greek word atomos  Philosophical Idea – No Experimental Evidence  Idea.

What Are Elements? come on meet the elements Topic 3.

1. Pick up a picture from teacher 2. Conduct research using your phones and textbook to find: birth date- death date country, state, city of origin major.

Have you ever tried to observe or study something that you could not see?

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

Bell-Ringer How have your ideas about Santa Claus and the Easter Bunny changed as you have grown up? Is it important to keep an open mind when it comes.

The Advent of Modern Atomic Theory

Topic 3 Periodic Table The development of the Atomic theory.

Chapter 3: Atoms-The Building Blocks of Matter

Foundations of Atomic Theory

The Atom: From Philosophical Idea to Scientific Theory

The Atom: From Philosophical Idea to Scientific Theory

Models of the Atom a Historical Perspective

Foundations of Atomic Theory

Section 1: Early Ideas About Matter

Atomic Structure PSC Chapter 3.

Section 1: Early Ideas About Matter

Atoms: The Building Blocks of Matter

Presentation transcript:

The Advent of Modern Atomic Theory Vocabulary: 1. theory 2. Democritus 3. science 4. John Dalton 5. Dalton’s model 6. Dalton’s atomic theory 7. Law of Definite Composition 8. Law of Multiple Proportions “Black Circle” (1913) Kasimir Malevich Russian

How do you know that atoms exist? n After all, atoms are “only a theory?” (By the way, “only a theory” is perhaps my least favorite phrase ever!)

Theory n A set of statements or principles devised to explain a group of facts or phenomena, that has been repeatedly tested and can be used to make predictions about natural phenomena.

n Think about this: ä Imagine that the line below is a piece of iron. ä Could you cut it in half? ä Could you cut the half in half? ä And again? Where did the idea originate?

n Is there a point that you could not cut the wire in half and still have the same substance, in this case iron?

Where did the idea originate? Around 400 BC, Greek philosopher Democritus reasoned that there must be a point where matter can not be cut in half and still be the same substance; therefore, all matter must be made of indivisible particles that he called “atomos” meaning indivisible.

Do you think that Democritus’ idea is scientific? Explain.

The first scientific atomic theory John Dalton, 1807 Drew conclusions which became his atomic theory from repeatable observation and experimentation.

Dalton’s Model By observing that compounds always decompose to form fixed ratios of the elements in the compounds no matter how much of the compound you started with, Dalton concluded that there must be individual particles (atoms) combining in fixed ratios to form the compounds. HH O water

Dalton’s Model Dalton’s Atom

Dalton’s Atomic Theory 1. All matter is composed of atoms (still supported.) 2. Atoms of the same element are identical (not supported any more.) 3. Atoms can not be created or destroyed. (This is now called the law of conservation of mass.) 4. Atoms of different elements combine in simple whole-number ratios to form compounds. 5. In chemical reactions, atoms are combined, separated, or rearranged.

Results Law of Definite Composition: Compounds have a fixed ratio of component elements. (CO 2 in the U.S. is the same as CO 2 in Russia is the same CO 2 you breathe out is the same CO 2 plants absorb) Law of Multiple Proportions: Elements can combine in different ratios to make different compounds. (C 3 H 8 O is rubbing alcohol and C 12 H 11 O 22 is sugar)

Now it’s your turn… Read pp about J.J. Thomson and Ernest Rutherford. Take notes about: Who they were. What they discovered. How they discovered it (and what equipment/experiment they used to do it.) What they thought the atom looked like.