Atomic Theory.

Slides:

Advertisements

Similar presentations

Atomic Theory Timeline

Advertisements

Atomic Theory. Let’s Take a Trip Through Time! Atomic Theories Timeline Name Demo- critus DaltonThomsonRutherfordBohrSchrödinger Heisenberg Time Frame.

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

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

Atomic Structure Timeline

Atomic Structure.

AIM: Models of the Atom DO NOW:

The Complete Modern Atom

The History of Atomic Theory

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

History of Atomic Structure

Atomic Structure Timeline Read Around the Room. Democritus (400 B.C.) Proposed that matter was composed of tiny indivisible particles Not based on experimental.

Chapter 3 The History of the Atom. I. The Scientists and their Discoveries A.Democritus 1. Date = 400 B.C 2. Discovery = Theorized the smallest unit of.

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

Evolution of the Atomic Theory: from 400 B.C to late-20 th century Nazli Suyolcu 9D – Hisar Okullari.

Atomic Theory. Let’s Take a Trip Through Time! Atomic Theories Timeline Name DemocritusDaltonThompsonRutherfordBohrSchrödinger Heisenberg Time Frame.

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.

History of Atomic Theory

What is an atom??? An atom is the smallest particle of an element that retains its identity in a chemical reaction.

Atomic Theory. Let’s Take a Trip Through Time! Democritus 460 – 370 B.C. There are various basic elements from which all matter is made Everything is.

The Historical View of Atomic Structure Continued.

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.

History of Atomic Theory. Matter  The things around you that are matter (tables, air, people) consist of different types of atoms.

1 The Atom, in a nutshell…. 2 Democritus (c. 460—370 BC) Greek philosopher  The name atom was his idea  Proposed matter is made up of small particles.

History of the Atom Activity. Warm - Up Make a square using the puzzle pieces on your desk You discover a missing piece to the puzzle. Work by yourself.

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.

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.

Development of Atomic Theory Ancient Times | Dalton's Postulates | Thomson's Discovery of Electron Properties | Rutherford's Nuclear Atom | Bohr's Nuclear.

1 Development of Atomic Theory & Atomic Structure.

Atomic Theories: How do we know what atoms are made of?

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

History of the atom: History of the atom: Changing atomic models.

Atomic Concepts Review: Chemistry is the study of matter and the changes it undergoes. Matter is anything that has mass and takes up space. What’s the.

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

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

+ 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.

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

There are various basic elements from which all matter is made Everything is composed of small atoms moving in a void Some atoms are round, pointy, oily,

THE STRUCTURE OF THE ATOM.  All atoms consist of 2 regions:  1) Nucleus: very small region located near the center of the atom  Proton: positively.

History of the Atomic Theory An atom is the smallest particle of an element that retains its identity in a chemical reaction. Our current theory of the.

Atomic Theorists The ‘Who’s Who’ of the atomic world.

Atomic Theory Mr. Tollefson Chemistry Class. Introduction Students will be introduced to the atom and the development of the atomic theory from ancient.

Development of the Atom Model

History of Atomic Theory

Chapter 4 Atoms 1. Atomic Structure Timeline

Chapter 4 Atoms.

Chapter 3: Atomic Theory

Presentation transcript:

Atomic Theory

Let’s Take a Trip Through Time!

Atomic Theories Timeline Name Democritus Dalton Thompson Rutherford Bohr Schrödinger Heisenberg Time Frame Key Points Copy all notes in red on your graphic organizer through slide 17!

Democritus 400 B.C. There are various basic elements from which all matter is made Everything is composed of small atoms Some atoms are round, pointy, oily, have hooks, etc. to account for their properties

Democritus’s Model

John Dalton Introduced his ideas in 1803 Each element is composed of extremely small particles called atoms All the atoms of a given element are identical, but they differ from those of any other element Atoms are neither created nor destroyed in any chemical reaction

Dalton’s Model

J.J. Thompson 1904 Discovered electron (negative particle) in the Cathode Ray Experiment Plum Pudding model 1904 Electrons in a soup of protons (positive charges) There is an equal number of positive and negative charges because the atom is neutral

Cathode Ray Tube Experiment

Thompson’s Model Protons Electrons

Ernest Rutherford 1910 Nucleus Theory 1910 alpha particle gold foil experiment An atom’s mass is mostly in the nucleus The nucleus has a positive charge because it contains the protons and because it is so large in mass it contains another particle called the neutrons(neutral) Electrons in fixed orbit

Alpha Particle Experiment

Rutherford Model

Niels Bohr 1913 Planetary Model 1913 Nucleus surrounded by orbiting electrons at different energy levels Electrons have definite orbits Worked on the Manhattan Project (US atomic bomb)

Bohr’s Model Neutrons (No charge) Electrons (negative charge) Protons (positive charge)

Ernst Schrödinger Werner Heisenberg Quantum Mechanical Model 1926 Electrons are in probability zones called “orbitals”, not orbits and the location cannot be pinpointed and they are constantly moving (they are not moving in circular orbits) Schrödinger and Heisenburg’s Model of the Atom is the Model still accepted today.

Schrödinger and Heisenburg’s Model of the Atom

Timeline Activity You are going to construct a timeline of the development of the atom. It must include: Dates (5 points) Scientists (5 points) A description of the discovery (20 points) A drawing of the atom (10 points) Appearance/Colorful (10 points)