Modern Atomic Theory Grade 9 Science Chemistry.

Slides:

Advertisements

Similar presentations

History of the Atom & Atomic Structure

Advertisements

Defining the Atom All matter is composed of atoms

The ATOM. Atoms the basic building block of all matter the smallest particle of an element that retains the properties of that element electrically.

THE ROAD TO THE ATOM.

Phy 102: Fundamentals of Physics II Chapter 11: The Atomic Nature of Matter.

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

Atoms: Development of the Atomic Theory

Chapter 1 Section 1 Elements and Atoms.

Atomic Structure.

Development of the Atomic Theory

Introduction to Atoms.

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

The Complete Modern Atom

Atoms: Development of the Atomic Theory

+ ATOMIC THEORY. + Democritus Atom Democritus is an Ancient Greek philosopher born in Abdera, Thrace, Greece He was said to be the first step toward the.

History of Atomic Structure

What are important discoveries related to the structure of an atom?

Atom Models From Democritus to Bohr’s.

Unit: Atomic Structure

Chemistry: Matter and Chemical Bonding Early Atomic Theories.

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.

CHEMISTRY 112 Atomic Structure. Early Models of the Atom An atom is the smallest particle of matter that retains its identity in a chemical reaction Democritus.

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:

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

Matter & The Atom. Matter  The term matter describes all of the physical substances around us  Anything that has mass and volume (takes up space) 

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

How long have people been interested in understanding matter and its structure? Thousands of years Hundreds of years A few years Never.

Elements and Atoms.

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.

The Evolution of the Model of the Atom

History of the Atom. What do you know about the atom? Put simply, the atom is the smallest particle of pure essence. For example, helium gas is made up.

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

CHAPTER 4 ATOMIC STRUCTURE.  Define Democritus’s ideas about atoms  Explain Dalton’s Atomic Theory  Identify what instrument is used to observe individual.

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

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

Democritus Dalton (JJ Thompson) Rutherford Bohr Electron Cloud

Timeline of atomic structure

How did the atomic theory develop and change into the modern model of the atom?

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.

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

History of Atoms By: Layan Suleiman 7A.

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

The elements  The Greeks were the first to explain why chemical changes occur.  They proposed that all matter was composed of four substances: fire,

Structure of Matter The branch of science that explains how matter is put together is known as chemistry.

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.

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.

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

Chemistry Science 10 History of the Atom. Atomic Theory  Answer the following questions How long has the Atomic Theory been around?How long has the Atomic.

The Atom What defines the property of a substance.

+ 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.

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.

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

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

ATOMIC THEORY Atomic Theory Pioneers Democritus: A Greek philosopher around the year 400 BC. concluded that matter could not be divided into smaller.

Class Notes: Atomic Models. Democritus= 400 B.C. – said the world was made of two things: empty space and tiny particles called “atoms” --said atoms were.

FUN GRAPH FRIDAY!  What are 2 con- clusions you can draw from the graph to the right? 

Atomic Structure Chapter 4. What is an atom? Draw a circle map for atoms Atom: the smallest particle of an element that retains its identity in a chemical.

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,

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

Scientists and Their Contribution to the Model of an Atom

Atomic History and Theories

The Atomic Structure of Atoms

Origin of the idea of atom…

BELLWORK 9/11/17 What is the atom?

The History of Atomic Theory

Scientists and Their Contribution to the Model of an Atom

Presentation transcript:

Modern Atomic Theory Grade 9 Science Chemistry

Modern Atomic Theory Atoms are made of 3 particles; protons, neutrons and electrons Atoms have a nucleus that is made of protons and neutrons with electrons orbiting around it. Protons and electrons have opposite charges, therefore, they attract. This attraction holds the electrons around the nucleus.

Elements vs. Compounds An element is a pure substance made up of one type of particle, or atom. Each element has its own distinct properties and cannot be broken down into simpler substances by means of a chemical change. Compounds are pure substances that are made up of two or more elements chemically combined together. They can be broken down into elements again by chemical means.

Difference Between Theories and Laws Laws do not explain anything . They just describe and summarize what happens. Theories are imaginative ways to explain why something happens.

Democritus Around 400 BC, a Greek philosopher named Democritus suggested the first atomic theory He explained that all things are "composed of minute, invisible, indestructible particles of pure matter which move about eternally in infinite empty Even though there was no technology to help research Democritus‘s theory, he was very precise John Dalton, J.J. Thompson, Ernest Rutherford, Niels Bohr, and Ernest Schrodinger all contributed significantly to the modern atomic theory by finding the actual evidence.

John Dalton Lived from 1766-1844 Was one of the earliest scientists to contribute to the modern atomic theory. Dalton’s Theory All elements are composed of atoms. All atoms of the same element are identical – in particular they have the same mass. The atoms of one kind of element are different from the atoms of all other elements - in particular the atoms of one element have a different mass than those of other elements. Atoms are indestructible and retain their identity in chemical reactions. Compounds are formed by joining atoms in specific whole number ratios.

J.J Thompson Lived from 1856-1940 Won a noble prize for his great work on the electron. Realized that if there ware negative parts to atoms, then there must be positive parts as well to balance it, because most matter is neutral. His theory of electron distribution inside an atom was later proved to be incorrect by Ernest Rutherford. In 1897,discovered first subatomic particle, a component of all atoms, the electron

Ernest Rutherford Lived from 1871 – 1937 Made blueprints of an atom. Said to be the father of nuclear physics. Said that radiation was caused by the destruction of atoms and that the alpha particle is the helium nucleus.

Niels Bohr Lived from 1871 - 1937 Discovered the proton in 1910 Won the 1922 Nobel Prize for physics, mainly for his work on the structure of atoms

Erwin Schrodinger Lived from 1887 to 1961 Viewed electrons as continuous clouds Introduced "wave mechanics" as a mathematical model of the atom.