Warm Up: Density 9/10/14 1. Mass = 40g Volume = 20mL What is the Density? ___________ 2. Mass = 35g Density = 5 g /cm3 What is the Volume? 3. Density.

Slides:

Advertisements

Similar presentations

Atoms: Development of the Atomic Theory

Advertisements

The History of Atomic Theory

Powers of 10 What is the smallest unit of matter? Can we see atoms?

Atoms: Development of the Atomic Theory

The History of Atomic Theory

Atoms Mr. Skirbst Physical Science Topic 13. Atomic Models.

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

A Pictorial History of Atomic Theory

Atoms: Development of the Atomic Theory

Chapter 5: Atomic Theory Mr. Albaugh

The Atomic Model Chem 9.

Atoms and Moles Chapter 4 Approximately 2500 years ago Philosophers How many times can one divide something until there is nothing left?

The Atomic Theory. The Atom Protons and Neutrons.

Atomic Theory. History of Atomic Theory 400 B.C. The Greek philosopher Democritus proposed that matter is composed of relatively simple particles that.

OHHHHH YEAHHHHH.  400 BC Greece-philosophers  Democritus said that there must be something that cannot be divided  He called this particle atomos 

Atomic Models. Democritus This is the Greek philosopher Democritus who began the search for a description of matter more than 2400 years ago. He asked:

Chapter 4.1 – The Development of Atomic Theory 1.Democritus – - Greek philosopher, 4 th century BCE - suggested universe was made of indivisible units.

Atomic Structure History and Theories. The Greeks 4 th century B.C. Democritus “Atomists” school of thought Matter is composed of tiny indivisible particles.

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.

Chapter 4: Atomic Structure

Introduction to Atoms Chapter 4.

Atomic Theory How We Got Where We Are Today Robert Erwin UMS Rockwall ISD

The Development of the Atomic Theory. Investigating Atoms and Atomic Theory Students should be able to: Students should be able to: Describe the particle.

9/03/13 Practice: 1.Atom 2.Electron Cloud Exit: Starter: Match on next slide Atomic Theory 9/03/13 Atomic Theory Application: Fold and Glue notes here.

Atoms: Development of the Atomic Theory 1. Ancient Belief Ancient Greeks believed that all things were made up of earth, wind, fire, and water. Ancient.

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

Unit 3 Lesson 1 The Atom Copyright © Houghton Mifflin Harcourt Publishing Company.

Development of Atomic Theory In 440 BC, Democritus, a Greek Philosopher theorized that if you cut an object in half, then cut that one in half, you would.

Development of the Atomic Theory

1.3 Atomic Theory 1. John Dalton’s atomic theory - Matter is made up of small particles called atoms - Atoms cannot be created, destroyed or divided.

ATOMIC STRUCTURE REVIEW AND HISTORY OF THE ATOMIC MODEL Atomic Theory.

Basics Of Chemistry 8 th Science Matter Defined ► Matter – anything that has volume or mass. ► Everything you see and don’t see.

The Development of Atomic Theory

Development of the Atomic Theory. Democritus 460 BC - Greek philosopher proposes the existence of the atom ; calls it Atomos meaning indivisible. His.

Atoms Chapter 4.

1 Development of Atomic Theory & Atomic Structure.

Democritus This is the Greek philosopher Democritus who began the search for a description of matter more than 2400 years ago. This is the Greek philosopher.

8/31/15 Practice: Exit: Starter: Atomic Theory 8/31/15 Atomic Theory Application: Fold and Glue notes here when done ProtonsNeutronsElectronsDistinct Nucleus.

Introduction to Atoms. Introduction to Atoms Chapter 10 – Section 1  Atom: the smallest unit of an element that maintains the chemical properties of.

History of the Atomic Structure

DEVELOPMENT OF THE ATOMIC THEORY ATOMS. 460 BC - Greek philosopher proposes the existence of the atom He pounded materials until he made them into smaller.

Chapter 11 Introduction to Atoms. Section 1: Objectives  Describe some of the experiments that led to the current atomic theory.  Compare the different.

Investigating Atoms and Atomic Theory Students should be able to: – Describe the particle theory of matter. PS.2a – Use the Bohr model to differentiate.

Properties of Matter. Element A pure substance that cannot be broken down into simpler substances by ordinary chemical means. Sulfur.

A Brief History of Atomic Theory This Section will focus on Scientists who have had an impact on the study of the atom.

A Brief History of the Atomic Theory. 460 B.C. : Democritus Greek Philosopher Proposed that matter cannot be broken down indefinitely At some point you.

The Atomic Theory. Atom  The smallest particle into which an element can be divided and still be the same substance.  The smallest particle of an element.

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.

The Atom, Periodic Table, and Chemical Reactions Mrs. Hooks Unit 3.

Historical Development of an Atom. Democritus B.C Democritus was a Greek philosopher ( B.C.) who is the father of modern atomic thought.

The Beginning of the Atomic Theory Democritus was a Greek philosopher who was among the first to suggest the existence of atoms. 460 BC – 370 BC.

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

Who are these men?.

The Story of... The Atomic Theory! The characters may change, but their ideas connect.

Can you match the scientists’ names to their pictures? Democritus Dalton JJ Thomson Rutherford Bohr De Broglie Schrodinger.

Development of the Atomic Theory Chapter 4 - Section 1 p Vocabulary: 1.atom 2.Electron 3.nucleus 4.electron cloud.

Atomic Theory. English scientist John Dalton, suggested that matter was made up of elements An Element is a pure substance Each element is composed of.

S. Aldrich HISTORY OF THE ATOM 460 BCE Democritus develops the idea of atoms He believed that you could cut objects in half, over and over again,

Scientists and Their Contribution to the Model of an Atom

Atomic Theory and Atomic Structure

Atoms: Development of the Atomic Theory

Atoms: Development of the Atomic Theory

Atoms: Development of the Atomic Theory

Introduction to Atoms Chapter 11.

Introduction to Atoms Chapter 11.

Unit 3: Chemistry. Development of the Atomic Theory.

Atoms: Development of the Atomic Theory

Atoms: Development of the Atomic Theory

Presentation transcript:

Warm Up: Density 9/10/14 1. Mass = 40g Volume = 20mL What is the Density? ___________ 2. Mass = 35g Density = 5 g /cm3 What is the Volume? 3. Density = 7 g /mL Volume = 10mL What is the Mass?

OBJECTIVE 9/10/14- 9/11/14 TLW comprehend that the atom is the smallest unit of an element by analyzing the contributions of scientists used in development of the atomic theory with 100% participation.

Warm Up 9/11/14 Refer to handout on your table. Place your heading on your handout. Students pull a lab car across a table using a spring scale, adding mass for each trial. Create a table from the graphed information to show how mass affects the force needed to pull the car.

Atoms: Development of the Atomic Theory

Democritus 460 BC - Greek philosopher proposes the existence of the atom He pounded materials until he made them into smaller and smaller parts He called them atoma which is Greek for “indivisible”.

Democritus p.42-43 His Theory: All atoms: Are small hard particles Are made of a single material formed into different shapes and sizes Are always moving, and they form different materials by joining together

Solid Sphere Model or Bowling Ball Model Proposed by John Dalton John Dalton p.43 1803 - British chemist; elements combine in specific proportions to form compounds Solid Sphere Model or Bowling Ball Model Proposed by John Dalton

John Dalton p.43 His Theory: All substances are made of atoms that cannot be created, divided, or destroyed. Atoms join with other atoms to make new substances. Atoms of the same element are exactly alike, and atoms of different elements are different in mass and size.

Plum Pudding Model or Raisin Bun Model J.J. Thomson p.45-47 1897 - English chemist and physicist; discovered 1st subatomic particles Plum Pudding Model or Raisin Bun Model Proposed by J.J. Thomson

J.J. Thomson p.45-47 His Theory: Atoms contain negatively charged particles called electrons and positively charged matter. Created a model to describe the atom as a sphere filled with positive matter with negative particles mixed in Referred to it as the plum pudding model

Proposed by Ernest Rutherford Ernest Rutherford p.48-50 1912 - New Zealand physicist discovered the nucleus Nuclear Model Proposed by Ernest Rutherford

Ernest Rutherford p.48-50 His Theory: Small, dense, positively charged particle present in nucleus called a proton Electrons travel around the nucleus, but their exact places cannot be described.

Bohr Model or Planetary Model Niels Bohr p.51 1913 - Danish physicist; discovered energy levels Bohr Model or Planetary Model Proposed by Niels Bohr

Niels Bohr p.51 His Theory: Electrons travel around the nucleus in definite paths and fixed distances. Electrons can jump from one level to a path in another level.

Proposed by Erwin Schrodinger Erwin Shrodinger p.52 1924 - Austrian physicist; developed the electron cloud model Electron Cloud Model Proposed by Erwin Schrodinger

Erwin Shrodinger p. 52 His Theory: The exact path of electrons cannot be predicted. The region referred to as the electron cloud, is an area where electrons can likely be found.

James Chadwick p.51 1932 - English physicist; discovered neutrons His Theory: Neutrons have no electrical charge. Neutrons have a mass nearly equal to the mass of a proton. Unit of measurement for subatomic particles is the atomic mass unit (amu).

Modern Theory of the Atom Atoms are composed of three main subatomic particles: the electron, proton, and neutron. Most of the mass of the atom is concentrated in the nucleus of the atom.

Modern Theory of the Atom The protons and neutrons are located within the nucleus, while the electrons exist outside of the nucleus. In stable atoms, the number of protons is equal to the number of electrons.

Modern Theory of the Atom The type of atom is determined by the number of protons it has. The number of protons in an atom is equal to the atomic number.

Modern Theory of the Atom The sum of the number of protons and neutrons in a particular atom is called the atomic mass. Valence electrons are the outermost electrons.