Friday October 1, 2010 (WS – ATOMIC STRUCTURE). Bell Ringer Friday, 10-1-10 What do all atoms have in commom?

Slides:

Advertisements

Similar presentations

Advertisements

The Structure of an Atom

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

From Philosophical Idea to Scientific Theory

Atomic Theories.

Have 1 Periodic Table per group!.  The mass number.

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

Development of the MODEL of the ATOM. Way back – to the time of the Greeks Democritus ( BC) stated that all matter is made of tiny particles. He.

Defining the Atom All matter is composed of atoms

Early Models of the Atom –An atom is the smallest particle of an element that retains its identity in a chemical reaction. –Philosophers and scientists.

Atomic Theory “History of. . . ”.

 You cannot see them, yet they make up everything…

Atomic Theory and the Atom

Atomic Structure.

History of the Atom; Modern Atomic Theory, Subatomic Particles

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

Early Theories & Subatomic Particles ( )

End Show Slide 1 of 18 © Copyright Pearson Prentice Hall Defining the Atom > Early Models of the Atom An atom is the smallest particle of an element that.

HW for Next Class:  Read pages  Worksheet: 5.2 (Structure of Nuclear Atom)  Quiz: Next time.

History of Atomic Theory

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

Atoms: The Building Blocks Of Matter

PART ONE ATOMIC THEORY. Over the course of thousands of years our idea of what matter is made of and what the atom looks like has changed dramatically.

Atomic Theory Chapter 3 Sections 1 &2 9/18/14.

The Development of the Atomic Theory

Chapter 4: Atomic Structure

Exam 3 – Unit 2 Complete individually. No notes. No talking.

TITLE The Development of Atomic Theory. Early Ideas Democritus—Greece 400 B.C. His idea:  There was a limit to how far you could divide matter. You would.

Atomic Theory: the beginning Chapter 3 Part I. Democritus An Ancient Greek Theorized about the existence of atoms. Did not use Scientific Method.

Atomic Structure Section 4.1 and 4.2.

Discovery of the Atom. Democritus  Democritus was an ancient Greek who had a philosophical idea of an atom.  His approach was not based on the scientific.

Chapter 4: Atomic Structure

A History of Atomic Theory & Basic Atomic Structure Chapter 3: The Atom Big Idea: Physical, chemical and nuclear changes are explained using the location.

Section 1- Discovering the parts of the atom

Atomic Theory “History of... ”. The Ancient Greeks Democritus and other Ancient Greeks were the first to describe the atom around 400 B.C. The atom was.

The Story of the Atom History and Other Early Stories.

DALTON’S ATOMIC THEORY 1803 Read each of the following postulates and determine whether each is True or False.

Atoms: The Building Blocks of Matter. PART 1  Democritus [400 B.C]  Greek philosopher  Hypothesized: Nature has a basic indivisible particle of which.

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

The Historical View of Atomic Structure Continued.

GSCI 163 Lecture 2. Atomic theory What are things made of? Imagine dividing an object into smaller and smaller units. Is there a limit to how much we.

History of Atom Flip Book

FAIR USE STATEMENT: Please feel free to edit and use this presentation in your classroom. Please do not remove the credit line on the title page or republish.

The Chemical Behavior of Atoms Day 1. Curriculum  Big Idea: Atomic theory is the foundation for the study of chemistry.  Concept: Energy is absorbed.

The Atomic Theory of Matter By Shaffer Lisle. The First Theories John Dalton’s proposed theories: Each element is composed of particles called atoms.

Ch. 4: Atomic Structure 4.1 Defining the Atom. History  Democritus named the most basic particle named the most basic particle atom- means “indivisible”

Foundations of Atomic Theory The transformation of a substance or substances into one or more new substances is known as a chemical reaction.

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

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

Ch. 4: Atoms/Atomic Theory. Atoms Definition - the smallest particle that has the properties of an element, basic unit of matter 119 distinct atoms as.

MODERN CHEMISTRY CH 3 Atoms: The Building Blocks of Matter.

Ch. 3 Atoms: The Building Blocks of Matter. Table of Contents Chapter 3 Atoms: The Building Blocks of Matter Section 1 The Atom: From Philosophical Idea.

Chapter 3 Atoms and matter. laws The transformation of a substance or substances into one or more new substances is known as a chemical reaction. Law.

The History of the Atom Democritus to Rutherford.

Chemistry Chapter 4 Notes #1 09/10/10. Democritus Matter is composed of empty space where atoms move Atoms are solid, homogenous, indivisible, and indestructible.

Chapter 4. Atom Smallest particle of an element that retains its chemical identity Atoms of the same element cannot be separated chemically because they.

+ 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.

The Atom - Scientists. Philosophers Democritus – believed matter was not infinitely divisible THERE WERE NO EXPERIMENTS TO TEST HIS IDEAS Matter is composed.

Foundations of the Atomic Theory. Don’t forget how we got here, thanks to Democ., Aristotle, and the Particle Theory of Matter.

Thursday September 27, 2012 (Begin Atomic Structure Research Project)

Atomic Theory & Periodic Table Unit 3 Part 1 (Ch. 4 & 5) Atomic Theory Introduction, Isotopes.

Chapter 3 Atoms: The Building Blocks of Matter. Lesson 1.1: Early Atomic Theory Learning Target: I will understand the history and structure of the atom.

Chapter 4. ◦ The lab technician shown here is using a magnifying lens to examine a bacterial culture in a petri dish. When scientists cannot see the details.

Atomic Theory In 1808, the English Chemist John Dalton proposed the first theory of the nature of matter in stating that all matter was composed of atoms.

Atomic Structure.

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

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

Atoms: The Building Blocks of Matter

Chapter 3 Brian, Eric, Harry, Rafi.

Presentation transcript:

Friday October 1, 2010 (WS – ATOMIC STRUCTURE)

Bell Ringer Friday, What do all atoms have in commom?

Announcements Please get your binders out!

John Dalton Recall that in 1808, an English schoolteacher named John Dalton reasoned that: elements were composed of atoms. only whole numbers of atoms can combine to form compounds. Expanding on these notions, Dalton published his theory on atom and their structure, characteristics, and properties.

The Five Key Points of Dalton’s Atomic Theory 1.All matter is composed of extremely small particles called atoms. 2.Atoms of a given element are identical in size, mass and other properties: atoms of different elements differ in these ways. 3.Atoms cannot be subdivided, created or destroyed. 4.Atoms of different elements combine in simple whole-number ratios to form compounds 5.In chemical reactions, atoms are combined, separated or rearranged.

Later Alterations to Dalton’s Atomic Theory Atoms are no longer thought of as indivisible. Atoms have in more recent years been divided into smaller particles: protons, neutrons and electrons. Neutrons have been further divided into quarks and gluons. We now know that are atoms of a given element do not necessarily have the same mass. Elements consist of various isotopes – same number of protons bur differing numbers of neutrons.

The Modern Atomic Theory Dalton turned Democritus’ idea into a scientific theory. The important concepts of all matter being composed of atoms and atoms of any one element differing from atoms of another element remain unchanged.

The Structure of the Atom

What Does an Atom Look Like?

We can only attempt to illustrate the structure of the atom in a simplified way.

What is an atom? An atom is the smallest particle of an element that retains the chemical properties of that element. An atom is the smallest particle of matter – if you break an atom into smaller pieces, those pieces are not considered to be matter. All atoms consist of two “regions” the nucleus the electron cloud

The Atom’s Electron Cloud The electron cloud contains electrons with a negative (-) electromagnetic charge. The electron cloud is very large compared to the nucleus. If the electron cloud of an atom was the size of this room, the nucleus would be the size of a grain of sand!

The Discovery of the Electron J. J. Thompson In the late 1800s, experiments were conducted in cathode-ray tubes – an electric current was passed through various gases at different temperatures. The surface of the tube opposite the cathode glowed. An object placed between the cathode and the opposite end of the tube cast a shadow on the glass. A paddle wheel placed on rails between the electrodes rolled along the rails from cathode to anode. This supported the existence of cathode rays.

The Discovery of the Electron Thompson hypothesized that the glow was caused by a stream of particles, and he called them cathode rays. With a current, the rays traveled through the tube from cathode to anode.

The Discovery of the Electron

The Atom’s Nucleus The nucleus of an atom is very small compared to the atom as a whole. The nucleus contains two different types of particles. protons having a positive (+) electromagnetic charge neutrons having no (0) electromagnetic charge

Ernest Rutherford discovered the nucleus of the atom with his famous gold foil experiment

The Discovery of the Nucleus The Discovery of the Atomic Nucleus

Worksheet Atomic Structure