Atomic Theory The Who’s Who of Atoms. Democritus ~460 BCE. Defined atom as the “smallest bit of...

19
Atomic Theory The Who’s Who of Atoms

TAGS:

Transcript of Atomic Theory The Who’s Who of Atoms. Democritus ~460 BCE. Defined atom as the “smallest bit of...

Page 1: Atomic Theory The Who’s Who of Atoms. Democritus ~460 BCE. Defined atom as the “smallest bit of matter. 100 years later, Aristotle dismissed his idea.

Atomic Theory

The Who’s Who of Atoms

Page 2: Atomic Theory The Who’s Who of Atoms. Democritus ~460 BCE. Defined atom as the “smallest bit of matter. 100 years later, Aristotle dismissed his idea.

Democritus

• ~460 BCE.• Defined atom as the “smallest

bit of matter.• 100 years later, Aristotle

dismissed his idea as “worthless.”

Page 3: Atomic Theory The Who’s Who of Atoms. Democritus ~460 BCE. Defined atom as the “smallest bit of matter. 100 years later, Aristotle dismissed his idea.

John Dalton

• 1805• Said matter consisted of

elementary lumpy particles• First Atomic Theory• 5 Parts to his model:

Page 4: Atomic Theory The Who’s Who of Atoms. Democritus ~460 BCE. Defined atom as the “smallest bit of matter. 100 years later, Aristotle dismissed his idea.

Dalton’s Atomic Model

1. All matter is made of tiny particles called atoms.

2. All atoms of one element are alike.3. Atoms of one element are different

from atoms of other elements.4. Compounds are formed when atoms

from different elements combine.5. Chemical reactions involve re-

arrangement of atoms, not changes in atoms themselves.

Page 5: Atomic Theory The Who’s Who of Atoms. Democritus ~460 BCE. Defined atom as the “smallest bit of matter. 100 years later, Aristotle dismissed his idea.

J.J. Thomson

• 1897• Discovered the electron with his

Cathode Ray Tube Experiment• Came up with the “Plum Pudding

Model” of atom

Page 6: Atomic Theory The Who’s Who of Atoms. Democritus ~460 BCE. Defined atom as the “smallest bit of matter. 100 years later, Aristotle dismissed his idea.

Cathode Ray Tube Experiment

Page 7: Atomic Theory The Who’s Who of Atoms. Democritus ~460 BCE. Defined atom as the “smallest bit of matter. 100 years later, Aristotle dismissed his idea.

Plum Pudding Model

“Real” Plum Pudding

Page 8: Atomic Theory The Who’s Who of Atoms. Democritus ~460 BCE. Defined atom as the “smallest bit of matter. 100 years later, Aristotle dismissed his idea.

Max Planck

• 1900• When you vibrate atoms enough

(heat it until it glows), you only get energy in whole intervals: energy packets called “quanta.”

Page 9: Atomic Theory The Who’s Who of Atoms. Democritus ~460 BCE. Defined atom as the “smallest bit of matter. 100 years later, Aristotle dismissed his idea.

Ernest Rutherford

• 1911• Discovered the nucleus with his

Gold Foil Experiment•Nucleus: the small, dense, positively-

charged center of the atom

• In 1919, he identified “protons”

Page 10: Atomic Theory The Who’s Who of Atoms. Democritus ~460 BCE. Defined atom as the “smallest bit of matter. 100 years later, Aristotle dismissed his idea.
Page 11: Atomic Theory The Who’s Who of Atoms. Democritus ~460 BCE. Defined atom as the “smallest bit of matter. 100 years later, Aristotle dismissed his idea.

Rutherford’s Atom

Page 12: Atomic Theory The Who’s Who of Atoms. Democritus ~460 BCE. Defined atom as the “smallest bit of matter. 100 years later, Aristotle dismissed his idea.

Robert A. Millikan

• 1916• Found charge and mass of

electron with his Oil Drop Experiment

Page 13: Atomic Theory The Who’s Who of Atoms. Democritus ~460 BCE. Defined atom as the “smallest bit of matter. 100 years later, Aristotle dismissed his idea.

Oil Drop Experiment

Page 14: Atomic Theory The Who’s Who of Atoms. Democritus ~460 BCE. Defined atom as the “smallest bit of matter. 100 years later, Aristotle dismissed his idea.

Niels Bohr

• 1912• Developed planetary model of

the atom• Discovered that electrons move

around the nucleus at set distances

• Called these “electron orbitals.”

Page 15: Atomic Theory The Who’s Who of Atoms. Democritus ~460 BCE. Defined atom as the “smallest bit of matter. 100 years later, Aristotle dismissed his idea.

Electron Orbitals

Page 16: Atomic Theory The Who’s Who of Atoms. Democritus ~460 BCE. Defined atom as the “smallest bit of matter. 100 years later, Aristotle dismissed his idea.

“Bohr Model” of the Atom

Page 17: Atomic Theory The Who’s Who of Atoms. Democritus ~460 BCE. Defined atom as the “smallest bit of matter. 100 years later, Aristotle dismissed his idea.

James Chadwick

• 1932• Discovered the neutron

Page 18: Atomic Theory The Who’s Who of Atoms. Democritus ~460 BCE. Defined atom as the “smallest bit of matter. 100 years later, Aristotle dismissed his idea.

So Then We Have This!

Page 19: Atomic Theory The Who’s Who of Atoms. Democritus ~460 BCE. Defined atom as the “smallest bit of matter. 100 years later, Aristotle dismissed his idea.

Let’s Memorize These Guys!

• It’s the least we can do to commemorate all their hard work!

• Quiz on Friday!

• 5 minute break? Then SUBATOMIC PARTICLES!


ANCIENT GREECE 3000 BCE – 400 BCE

ANCIENT GREECE 3000 BCE – 400 BCE

Concept of the Atom Democritus 400 B.C.E., Greece Democritus.

Concept of the Atom Democritus 400 B.C.E., Greece Democritus.

753 BCE 510 BCE · 753 BCE 55 BCE 510 BCE CE1 202 BCE 130 BCE CE 43 CE 61 The building of Rome begins. Julius Caesar first invades Britain but is forced to return home. Rome becomes

753 BCE 510 BCE · 753 BCE 55 BCE 510 BCE CE1 202 BCE 130 BCE CE 43 CE 61 The building of Rome begins. Julius Caesar first invades Britain but is forced to return home. Rome becomes

Atomic Theories. Atomic Theory – A Short History Fifth Century, BCE Democritus Believed matter was composed of very small, individual particles.

Atomic Theories. Atomic Theory – A Short History Fifth Century, BCE Democritus Believed matter was composed of very small, individual particles.

The Olmec , 1500 BCE – 400 BCE

The Olmec , 1500 BCE – 400 BCE

Democritus University of Thrace · 2010-10-06 · Democritus University of Thrace ... 2†-# ˚@

Democritus University of Thrace · 2010-10-06 · Democritus University of Thrace ... 2†-# ˚@

Velázquez’s Democritus Global Disillusion and the Critical ...javierberzal.com/wp-content/uploads/2017/02/Democritus-Berzal-de-… · Velázquez’s Democritus: Global Disillusion

Velázquez’s Democritus Global Disillusion and the Critical ...javierberzal.com/wp-content/uploads/2017/02/Democritus-Berzal-de-… · Velázquez’s Democritus: Global Disillusion

The Roman Republic: 509 BCE - 27 BCE

The Roman Republic: 509 BCE - 27 BCE

Minoan Greece 3100 BCE – 1400 BCE

Minoan Greece 3100 BCE – 1400 BCE

Atomic Structure Chapter 5 The Atomists: The first atomic theory 460 BCE: Greek Democritus suggested that matter is “ composed of minute, invisible,

Atomic Structure Chapter 5 The Atomists: The first atomic theory 460 BCE: Greek Democritus suggested that matter is “ composed of minute, invisible,

The Seleucid Empire (312 BCE – 63 BCE)

The Seleucid Empire (312 BCE – 63 BCE)

300 BCE – 232 BCE Devin Ouellette. Birth of Asoka 300 BCE Marriage 284 BCE Conversion to Buddhism 263 BCE Reign begins 272 BCE Death in 232 BCE.

300 BCE – 232 BCE Devin Ouellette. Birth of Asoka 300 BCE Marriage 284 BCE Conversion to Buddhism 263 BCE Reign begins 272 BCE Death in 232 BCE.

THE QIN DYNASTY 221 BCE – 206 BCE

THE QIN DYNASTY 221 BCE – 206 BCE

Matter. Origins of the Idea Democritus (~400 BCE) –Matter is composed of atoms –Atoms are eternal, invisible, indivisible, and incompressible Greeks believed.

Matter. Origins of the Idea Democritus (~400 BCE) –Matter is composed of atoms –Atoms are eternal, invisible, indivisible, and incompressible Greeks believed.

II. History of atomic structure A. Democritus – 500 BCE Theorized that matter is composed of small, indivisible particles = ATOMOS (Greek for indivisible)

II. History of atomic structure A. Democritus – 500 BCE Theorized that matter is composed of small, indivisible particles = ATOMOS (Greek for indivisible)

Democritus and Aristotle

Democritus and Aristotle

Ancient Greeks 600 BCE-300 BCE

Ancient Greeks 600 BCE-300 BCE

c. 1025 BCE 1010 BCE King David 1 BCE - United Synagogue History... · BCE King David 1 c. 970 BCE–c. 931 BCE ... Bar Kokhba (Bar Kosiba) leads a large Jewish revolt against Rome

c. 1025 BCE 1010 BCE King David 1 BCE - United Synagogue History... · BCE King David 1 c. 970 BCE–c. 931 BCE ... Bar Kokhba (Bar Kosiba) leads a large Jewish revolt against Rome

DEMOCRITUS · 2012. 11. 26. · Democritus 95 DATE, TEACHERS, AND PHILOSOPHICAL RELATIONSHIPS Democritus himself gives us some indication of his age and era. In his Lesser World System,

DEMOCRITUS · 2012. 11. 26. · Democritus 95 DATE, TEACHERS, AND PHILOSOPHICAL RELATIONSHIPS Democritus himself gives us some indication of his age and era. In his Lesser World System,

1 Quantum Mechanics Chapters 4 & 5. 2 WAY WAY BACK IN TIME... Greek philosopher Democritus (460- 370 BCE.) Greek philosopher Democritus (460- 370 BCE.)

1 Quantum Mechanics Chapters 4 & 5. 2 WAY WAY BACK IN TIME... Greek philosopher Democritus (460- 370 BCE.) Greek philosopher Democritus (460- 370 BCE.)