History of the Atomic Model Democritus (400 BC) Democritus (400 BC)

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History of the Atomic History of the Atomic Model Model Democritus (400 BC) Democritus (400 BC)

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Transcript of History of the Atomic Model Democritus (400 BC) Democritus (400 BC)

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History of the Atomic History of the Atomic ModelModel

Democritus (400 BC)Democritus (400 BC)

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History of the Atomic History of the Atomic ModelModel

Democritus (400 BC)Democritus (400 BC) Reasoned that matter was composed of Reasoned that matter was composed of

a few indivisible units that combine to a few indivisible units that combine to make everything around us.make everything around us.

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History of the Atomic History of the Atomic ModelModel

Democritus (400 BC)Democritus (400 BC) John Dalton (1800)John Dalton (1800)

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History of the Atomic History of the Atomic ModelModel

Democritus (400 BC)Democritus (400 BC) John Dalton (1800)John Dalton (1800)

Conducted experiments that showed Conducted experiments that showed small units of matter (atoms) combine small units of matter (atoms) combine in specific ways. in specific ways.

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History of the Atomic History of the Atomic ModelModel

Democritus (400 BC)Democritus (400 BC) John Dalton (1800)John Dalton (1800) J.J. Thompson (1897)J.J. Thompson (1897)

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CRT animation

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Plumb pudding model

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Dr. Cox on Thompson

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History of the Atomic History of the Atomic ModelModel

Democritus (400 BC)Democritus (400 BC) John Dalton (1800)John Dalton (1800) J.J. Thompson (1897)J.J. Thompson (1897)

Squeezed electrons out of atoms Squeezed electrons out of atoms demonstrating that atoms are made of demonstrating that atoms are made of smaller particles. Thompson is smaller particles. Thompson is responsible for the plumb pudding responsible for the plumb pudding (chocolate chip cookie) model.(chocolate chip cookie) model.

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History of the Atomic History of the Atomic ModelModel

Democritus (400 BC)Democritus (400 BC) John Dalton (1800)John Dalton (1800) J.J. Thompson (1897)J.J. Thompson (1897) Ernest Rutherford (1898)Ernest Rutherford (1898)

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How it works

Dr. Cox on Rutherford

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History of the Atomic History of the Atomic ModelModel

Democritus (400 BC)Democritus (400 BC) John Dalton (1800)John Dalton (1800) J.J. Thompson (1897)J.J. Thompson (1897) Ernest Rutherford (1898)Ernest Rutherford (1898)

Demonstrated that atoms contain small Demonstrated that atoms contain small heavy positively charged centers. We heavy positively charged centers. We call that center the nucleus.call that center the nucleus.

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History of the Atomic History of the Atomic ModelModel

Democritus (400 BC)Democritus (400 BC) John Dalton (1800)John Dalton (1800) J.J. Thompson (1897)J.J. Thompson (1897) Ernest Rutherford (1898)Ernest Rutherford (1898) Niels BohrNiels Bohr

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Bohr model

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History of the Atomic History of the Atomic ModelModel

Democritus (400 BC)Democritus (400 BC) John Dalton (1800)John Dalton (1800) J.J. Thompson (1897)J.J. Thompson (1897) Ernest Rutherford (1898)Ernest Rutherford (1898) Niels BohrNiels Bohr

Demonstrated that electrons exist in Demonstrated that electrons exist in specific energy levels. As electrons drop specific energy levels. As electrons drop from high to low orbitals only specific from high to low orbitals only specific colors of light are released.colors of light are released.

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History of the Atomic History of the Atomic ModelModel

Democritus (400 BC)Democritus (400 BC) John Dalton (1800)John Dalton (1800) J.J. Thompson (1897)J.J. Thompson (1897) Ernest Rutherford (1898)Ernest Rutherford (1898) Niels Bohr (1915)Niels Bohr (1915) Erwin Schrodinger and Werner Erwin Schrodinger and Werner

Heisenburg (1926)Heisenburg (1926)

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What is it…wave or particle?

Lame song

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History of the Atomic History of the Atomic ModelModel

Democritus (400 BC)Democritus (400 BC) John Dalton (1800)John Dalton (1800) J.J. Thompson (1897)J.J. Thompson (1897) Ernest Rutherford (1898)Ernest Rutherford (1898) Niels Bohr (1915)Niels Bohr (1915) Erwin Schrodinger and Werner Erwin Schrodinger and Werner

Heisenburg (1926)Heisenburg (1926) Electrons are weird. More like clouds than Electrons are weird. More like clouds than

particles.particles.


Atoms and the Periodic Table The Atom Ch. 4. Democritus (400 BC) Greek philosopher. All things are composed of tiny, indivisible particles: called: Atomos.

Atoms and the Periodic Table The Atom Ch. 4. Democritus (400 BC) Greek philosopher. All things are composed of tiny, indivisible particles: called: Atomos.

Upper 6th – Unit 5 Nuclear Physics. Ideas about Atoms Timeline 400 BC – Democritus – idea of atomismDemocritus 1803 AD – Dalton – elements made of atoms.

Upper 6th – Unit 5 Nuclear Physics. Ideas about Atoms Timeline 400 BC – Democritus – idea of atomismDemocritus 1803 AD – Dalton – elements made of atoms.

The Atom Chapters 4-5 Atomic Theories Democritus ~ 400 BC believed that atoms were indivisible and indestructible Dalton ~ 1800’s Developed through experiments.

The Atom Chapters 4-5 Atomic Theories Democritus ~ 400 BC believed that atoms were indivisible and indestructible Dalton ~ 1800’s Developed through experiments.

Chapter 7 Atomic Structure and Periodicity. Democritus 400 BC Greek philosopher Suggested atoms Used intuition.

Chapter 7 Atomic Structure and Periodicity. Democritus 400 BC Greek philosopher Suggested atoms Used intuition.

Ch 4 – Atomic Structure History: 1.Democritus- (400 BC) What’s the smallest possible particle? Break a rock into pieces… eventually get to smallest possible.

Ch 4 – Atomic Structure History: 1.Democritus- (400 BC) What’s the smallest possible particle? Break a rock into pieces… eventually get to smallest possible.

NOTES 4 – Atomic Structure. The Idea of the Atom Democritus (~400 BC) Democritus (~400 BC) Greek philosopherGreek philosopher “All matter is made of tiny,

NOTES 4 – Atomic Structure. The Idea of the Atom Democritus (~400 BC) Democritus (~400 BC) Greek philosopherGreek philosopher “All matter is made of tiny,

“What are ATOMS?”. Leucippus and Democritus (400? BC) Greek philosopher and his “student” New idea: - there is a limit to how far matter can be divided.

“What are ATOMS?”. Leucippus and Democritus (400? BC) Greek philosopher and his “student” New idea: - there is a limit to how far matter can be divided.

Democritus- Greek philosopher who lived around 400 BC who proposed: The universe is made of indivisible units. Called these units atoms, from the.

Democritus- Greek philosopher who lived around 400 BC who proposed: The universe is made of indivisible units. Called these units atoms, from the.

Atomic Structure Believing What You Cannot See. Early Models of the Atom Democritus (4 th Century BC) Democritus (4 th Century BC) Was the first to propose.

Atomic Structure Believing What You Cannot See. Early Models of the Atom Democritus (4 th Century BC) Democritus (4 th Century BC) Was the first to propose.

700 BC 600 BC 500 BC 400 BC 300 BC 200 BC 100 BC 0 100 200 ... Department/History of... · 700 bc 600 bc 500 bc 400 bc 300 bc 200 bc 100 bc 0 100 200 300 400 500 600 700 800 900 1000

700 BC 600 BC 500 BC 400 BC 300 BC 200 BC 100 BC 0 100 200 ... Department/History of... · 700 bc 600 bc 500 bc 400 bc 300 bc 200 bc 100 bc 0 100 200 300 400 500 600 700 800 900 1000

The Atom: History Recap The indivisible atom: Democritus (400 BC) proposed that matter consisted of particles that could not be cut into smaller pieces.

The Atom: History Recap The indivisible atom: Democritus (400 BC) proposed that matter consisted of particles that could not be cut into smaller pieces.

400 bc preview

400 bc preview

Chapter 2 – Atoms, Molecules, and Ions Evolution of the Atomic Model Democritus (400 bc) First to conceptualize the atom. He thought that matter was composed.

Chapter 2 – Atoms, Molecules, and Ions Evolution of the Atomic Model Democritus (400 bc) First to conceptualize the atom. He thought that matter was composed.

History of Atomic Structure. Democritus Ancient Philosophy Who: Democritus When: 400 B.C. Where: Greece What: Democritus believed that matter was made.

History of Atomic Structure. Democritus Ancient Philosophy Who: Democritus When: 400 B.C. Where: Greece What: Democritus believed that matter was made.

Atomic Theory-Democritus Greek philosopher, 400 BC Greek philosopher, 400 BC Named the smallest piece of matter “atomos,” meaning “not to be cut.” Named.

Atomic Theory-Democritus Greek philosopher, 400 BC Greek philosopher, 400 BC Named the smallest piece of matter “atomos,” meaning “not to be cut.” Named.

Chapter 4 Atomic Structure. Defining the Atom Early Models of the Atom Democritus – Greek philosopher suggested the existence of the atom around 400 BC.

Chapter 4 Atomic Structure. Defining the Atom Early Models of the Atom Democritus – Greek philosopher suggested the existence of the atom around 400 BC.

Chapter 4 – The Atom Evolution of the Atomic Model Democritus (400 bc) First to conceptualize the atom. He thought that matter was composed of tiny particles.

Chapter 4 – The Atom Evolution of the Atomic Model Democritus (400 bc) First to conceptualize the atom. He thought that matter was composed of tiny particles.

CHAPTER 2 Atoms, Molecules, and Ions. History 400 -370 BC - Democritus thought that there must be atoms, “invisible particles”. 384-322 BC – Aristotle.

CHAPTER 2 Atoms, Molecules, and Ions. History 400 -370 BC - Democritus thought that there must be atoms, “invisible particles”. 384-322 BC – Aristotle.

Atomic Structure 3.1. Atomic History In 400 BC a Greek Philosopher named Democritus suggested the universe was made of invisible units called atoms.

Atomic Structure 3.1. Atomic History In 400 BC a Greek Philosopher named Democritus suggested the universe was made of invisible units called atoms.

The Atom Chapter 3. From Idea to Theory Democritus, Greek philosopher, 400 B.C., introduced the concept of an atom, an ‘indivisible’ particle. Democritus,

The Atom Chapter 3. From Idea to Theory Democritus, Greek philosopher, 400 B.C., introduced the concept of an atom, an ‘indivisible’ particle. Democritus,