The Movers and Shakers of the Subatomic World.

Slides:

Advertisements

Similar presentations

Atomic Theory The Movers and Shakers of the Subatomic World.

Advertisements

The History of Atomic Theory

The History of Atomic Theory

The History of Atomic Theory

Atomic Theory The Movers and Shakers of the Subatomic World.

Investigating Atoms and Atomic Theory

The History of Atomic Theory

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

Atomos The History of Atomic Theory. Atomic Models This is the Bohr model. In this model, the nucleus is orbited by electrons, which are in different.

Atomic Models This model of the atom may look familiar to you. This is the Bohr model. In this model, the nucleus is orbited by electrons, which are in.

Investigating Atoms and Atomic Theory Atoms cannot be divided using chemicals. They do consist of parts, which include protons, neutrons, and electrons,

Investigating Atoms and Atomic Theory Describe the particle theory of matter. Describe the particle theory of matter. Use the Bohr model to differentiate.

Atomos: Not to Be Cut The History of Atomic Theory Date Objective: Identify Scientists and their contributions to the Atomic Theory.

Atomic Models This model of the atom may look familiar to you. This is the Bohr model. In this model, the nucleus is orbited by electrons, which are in.

The History of Atomic Theory Lecture 1: Spring 2013.

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

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.

History of the Atomic Theory The Movers and Shakers of the Subatomic World.

Atomos The History of Atomic Theory. Atomic Models A model uses ideas to explain facts A model can be changed as new information is collected.

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

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

Who are these men?.

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

The Atomic Theory – p Democritus  Democritus, 440 B.C.  Thought matter was made of tiny particles  Believed these particles could not be cut.

Chapter 4 Atomic Structure. Democritus Greek philosopher Tried to define matter more than 2400 years ago. – Could matter be divided into smaller and smaller.

Atomic Models This model of the atom may look familiar to you. This is the Bohr model. In this model, the nucleus is orbited by electrons, which are in.

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

What is an atom? Try to come up with your own definition. Now turn to your partner and discuss.

Scientists and Their Contribution to the Model of an Atom

Investigating Atoms and Atomic Theory

Introduction to Atoms Chapter 14 Section 1.

HISTORY OF THE ATOM AND ATOMIC THEORY

Introducing Atoms.

Atomic Theory Timeline

Who are these men? In this lesson, we’ll learn about the men whose quests for knowledge about the fundamental nature of the universe helped define our.

Bell Ringer We mentioned the Periodic Table of __________ yesterday.

Atoms: Development of the Atomic Theory

Timeline Use your textbook and any other resources available to research the contributions and approximate dates of the following scientists/ models: Democritus.

The History of Atomic Theory

The History of the Atom.

The History of Atomic Theory

Evolution of the atomic model

Atoms: Development of the Atomic Theory

Atomic Theory Review.

The History of Atomic Theory

Subatomic Particles and the Nuclear Atom

History of the Atomic Theory

The History of Atomic Theory

Investigating Atoms and Atomic Theory

The History of Atomic Theory

The History of Atomic Theory

The History of Atomic Theory

The History of Atomic Theory

Unit 2: History of the Atom

Atomic Models This model of the atom may look familiar to you. This is the Bohr model. In this model, the nucleus is orbited by electrons, which are in.

Atomic Theory Timeline

The History of Atomic Theory

The History of Atomic Theory

The History of Atomic Theory and Atomic Structure

The History of Atomic Theory

The History of Atomic Theory

Investigating Atoms and Atomic Theory

Investigating Atoms and Atomic Theory

Atoms: Development of the Atomic Theory

Atomic Theory and Atom Structure

Presentation transcript:

The Movers and Shakers of the Subatomic World. Atomic Theory The Movers and Shakers of the Subatomic World.

Dalton In the early 1800’s, the English chemist John Dalton did a number of experiments that eventually led to the acceptance of the idea of atoms.

Dalton’s Atomic Theory All elements are composed of atoms. Atoms are invisible and indestructible particles.

continued... Atoms of the same element are exactly alike. H H

continued... Atoms of different elements are different. O H

continued... Compounds are formed by the joining of atoms of two or more elements. H H O

Questions... What were the four parts of the Dalton’s atomic theory? Say it again...

Was he right? Dalton’s atomic theory of matter became one of the foundations of chemistry. BUT it needed work…other scientists had to modify the theory.

Thomson In 1897, the work of an English scientist J. J. Thomson provided the first hint that atoms were made up of even smaller particles Atoms are divisible…Dalton was wrong!

Thomson’s Model He stated that atoms are made up of positively (+) and negatively (-) charged particles

And... He thought the positive (+) and negative (-) particles were s p r e a d o u t in atoms like p p u l d u d m i s n (plums in puddin’)

Questions... What kind of particles did Thomson find in atoms? What did his idea of an atom look like?

Was Thomson Right? Not really…there are positively (+) and negatively (-) charged particles inside atoms. BUT...

Rutherford’s Model In 1908, Rutherford discovered the nucleus. He stated that atoms have a small, dense, positively (+) charged center called a nucleus.

Questions... What did Rutherford find inside the atom? What did Rutherford’s atom look like?

So... Where are the negative particles (electrons)? Particles are not spread out like plums in pudding… Positive particles (protons) are in the center (nucleus). Where are the negative particles (electrons)?

Bohr’s Model In 1913, Niels Bohr proposed an improvement to Rutherford’s Model: Electron’s move in definite orbits around the nucleus, like planets around the sun.

Questions... What did Bohr propose? Where were the particles in Bohr’s model of an atom? What did it look like? What was special about the electrons in Bohr’s model?

Are we there yet? Bohr’s model was used for a long time… BUT...

Modern Atomic Model An atom has a small, positively charged nucleus surrounded by a large region in which there are enough electrons (-) to make the atom neutral (0).

E E E E E P P P E P P P P P P P P P E E E E E E

Questions... Do electrons have specific orbits in the modern model? What does the atom look like in the new model?

Make Your Timeline After the sheet is passed out: write your name on it! Fill out the timeline according to date, scientist, notes, and picture (if there is one) for each scientist we went over. Neatness counts!!!!! HAVE FUN