Upload File

atomic theory. democritus- 440 b.c. he proposed that if you kept cutting something in half you would...

  • Home
  • Documents
  • Atomic Theory. Democritus- 440 B.C. He proposed that if you kept cutting something in half you would eventually end up with an “uncutable” particle. Which
18
Atomic Theory

Upload: cordelia-horn

Post on 30-Dec-2015

214 views

Category:

Documents


1 download

Report

TRANSCRIPT

Page 1: Atomic Theory. Democritus- 440 B.C. He proposed that if you kept cutting something in half you would eventually end up with an “uncutable” particle. Which

Atomic TheoryAtomic Theory

Page 2: Atomic Theory. Democritus- 440 B.C. He proposed that if you kept cutting something in half you would eventually end up with an “uncutable” particle. Which

Atomic TheoryAtomic Theory

• Democritus- 440 B.C.

• He proposed that if you kept cutting something in half you would eventually end up with an “uncutable” particle. Which he called an atom

• Greek: Atomos - indivisible

• Aristotle- 338-322 B.C

• He disagreed with Democritus. He believed you would never end up with an indivisible particle.

• Democritus- 440 B.C.

• He proposed that if you kept cutting something in half you would eventually end up with an “uncutable” particle. Which he called an atom

• Greek: Atomos - indivisible

• Aristotle- 338-322 B.C

• He disagreed with Democritus. He believed you would never end up with an indivisible particle.

Page 3: Atomic Theory. Democritus- 440 B.C. He proposed that if you kept cutting something in half you would eventually end up with an “uncutable” particle. Which

Atomic TheoryAtomic Theory

• Dalton- 1808

• In search of understanding why elements combine in specific ratios he discovered through his experiments that this happens because they are made of individual atoms.

• His theory states 3 things1- Atoms are small and cannot be created, divided or destroyed.2- Atoms of the same element are all alike3-Atoms join with other atoms to make new substances

Atoms

• Dalton- 1808

• In search of understanding why elements combine in specific ratios he discovered through his experiments that this happens because they are made of individual atoms.

• His theory states 3 things1- Atoms are small and cannot be created, divided or destroyed.2- Atoms of the same element are all alike3-Atoms join with other atoms to make new substances

Atoms

http://www.brainpop.com/science/matterandchemistry/atoms/
http://www.brainpop.com/science/matterandchemistry/atoms/
Page 4: Atomic Theory. Democritus- 440 B.C. He proposed that if you kept cutting something in half you would eventually end up with an “uncutable” particle. Which

Atomic StructureAtomic Structure

Page 5: Atomic Theory. Democritus- 440 B.C. He proposed that if you kept cutting something in half you would eventually end up with an “uncutable” particle. Which

The AtomThe Atom

• Atoms are extremely small.• Atoms contain a nucleus.• Atoms are made of subatomic

particles• Protons• Neutrons• Electrons

• Atoms are extremely small.• Atoms contain a nucleus.• Atoms are made of subatomic

particles• Protons• Neutrons• Electrons

Page 6: Atomic Theory. Democritus- 440 B.C. He proposed that if you kept cutting something in half you would eventually end up with an “uncutable” particle. Which

How small is small?How small is small?

• If you could enlarge a penny until it was as wide as the continental United States(about 3000miles), each of its atoms would be only about 3 cm in diameter- about the size of a ping pong ball.

• If you could enlarge a penny until it was as wide as the continental United States(about 3000miles), each of its atoms would be only about 3 cm in diameter- about the size of a ping pong ball.

Page 7: Atomic Theory. Democritus- 440 B.C. He proposed that if you kept cutting something in half you would eventually end up with an “uncutable” particle. Which

ProtonsProtons

• Positively charged particles (+).• Found in the nucleus.• All protons are identical• Each proton= 1 amu (atomic mass

unit)• Every atom of an element has the

same number of protons.

• Positively charged particles (+).• Found in the nucleus.• All protons are identical• Each proton= 1 amu (atomic mass

unit)• Every atom of an element has the

same number of protons.

Page 8: Atomic Theory. Democritus- 440 B.C. He proposed that if you kept cutting something in half you would eventually end up with an “uncutable” particle. Which

NeutronsNeutrons

• Particles that have no charge• Found in nucleus• All neutrons are identical• Protons & Neutrons are the most

massive particles in the atom but located in a very small area (nucleus)

• Particles that have no charge• Found in nucleus• All neutrons are identical• Protons & Neutrons are the most

massive particles in the atom but located in a very small area (nucleus)

Page 9: Atomic Theory. Democritus- 440 B.C. He proposed that if you kept cutting something in half you would eventually end up with an “uncutable” particle. Which

ElectronsElectrons

• Negatively charged particles (e-)• Located outside of the nucleus in rings

or levels called atomic clouds• Their mass is so small that it is usually

considered zero. • It takes more than 1,800 electrons to equal the

mass of one proton.• However electrons occupy most of an atoms

volume.

• Negatively charged particles (e-)• Located outside of the nucleus in rings

or levels called atomic clouds• Their mass is so small that it is usually

considered zero. • It takes more than 1,800 electrons to equal the

mass of one proton.• However electrons occupy most of an atoms

volume.

Page 10: Atomic Theory. Democritus- 440 B.C. He proposed that if you kept cutting something in half you would eventually end up with an “uncutable” particle. Which

Some Things to Remember!

Some Things to Remember!

• In an atom, the number of protons equals the number of electrons. As a result, the positive charge from protons equals the number of electrons which makes the atom neutral.

• All atoms of an element have the same atomic number.

• In an atom, the number of protons equals the number of electrons. As a result, the positive charge from protons equals the number of electrons which makes the atom neutral.

• All atoms of an element have the same atomic number.

Page 11: Atomic Theory. Democritus- 440 B.C. He proposed that if you kept cutting something in half you would eventually end up with an “uncutable” particle. Which
Page 12: Atomic Theory. Democritus- 440 B.C. He proposed that if you kept cutting something in half you would eventually end up with an “uncutable” particle. Which
Page 13: Atomic Theory. Democritus- 440 B.C. He proposed that if you kept cutting something in half you would eventually end up with an “uncutable” particle. Which

Periodic Table KeyPeriodic Table Key

Page 14: Atomic Theory. Democritus- 440 B.C. He proposed that if you kept cutting something in half you would eventually end up with an “uncutable” particle. Which

Atomic NumberAtomic Number

• Atomic # = the number of protons in an atom.

• Atomic # = the number of protons in an atom.

Page 15: Atomic Theory. Democritus- 440 B.C. He proposed that if you kept cutting something in half you would eventually end up with an “uncutable” particle. Which

Atomic MassAtomic Mass• Atoms are too small to be

measures in everyday units of mass (grams).

• Scientists use units knows as atomic mass units (amu).• A proton or a neutron has a mass

equal to about 1 amu.

• Atomic Mass is equal to the sum of protons and neutrons in an atom.

• Atoms are too small to be measures in everyday units of mass (grams).

• Scientists use units knows as atomic mass units (amu).• A proton or a neutron has a mass

equal to about 1 amu.

• Atomic Mass is equal to the sum of protons and neutrons in an atom.

Page 16: Atomic Theory. Democritus- 440 B.C. He proposed that if you kept cutting something in half you would eventually end up with an “uncutable” particle. Which

IsotopesIsotopes

• The number of neutrons in an atom can vary.

• Atoms with the same number of protons and a different number of neutrons are called isotopes.

• We identify an isotopes by the atoms mass.

Isotopes

• The number of neutrons in an atom can vary.

• Atoms with the same number of protons and a different number of neutrons are called isotopes.

• We identify an isotopes by the atoms mass.

Isotopes

http://www.brainpop.com/science/matterandchemistry/isotopes/
http://www.brainpop.com/science/matterandchemistry/isotopes/
Page 17: Atomic Theory. Democritus- 440 B.C. He proposed that if you kept cutting something in half you would eventually end up with an “uncutable” particle. Which

Arrangement of ElectronsArrangement of Electrons

• The first ring can only hold 2 electrons

• The first ring can only hold 2 electrons

Page 18: Atomic Theory. Democritus- 440 B.C. He proposed that if you kept cutting something in half you would eventually end up with an “uncutable” particle. Which

Arrangement of ElectronsArrangement of Electrons

• The 2nd and 3rd rings can both hold 8 electrons

• The 2nd and 3rd rings can both hold 8 electrons


Quantum Theory, Part 1. Development of the Atom History 400 B.C. LEUCIPPOS and DEMOCRITUS –Greek Philosophers –Everything that is tangible (able to be

Chapter 4 “Atomic Structure”. Section 4.1 Defining the Atom Greek philosopher Democritus Greek philosopher Democritus (460 B.C. – 370 B.C.) suggested

Chapter 3 Atoms: The Building Blocks of Matter. 3.1 The Atom: From Philosophical Idea to Scientific Theory –4th century B.C. Greek philosopher Democritus

Chapter Two The Atomic Theory of Matter Aristotle 400 B.C. - Democritus thought matter could not be divided indefinitely. 350 B.C - Aristotle modified

Atomic Theory Timeline 400 B.C. Democritus 350 B.C Aristotle 0 1743-1794 Lavoisier 1800 Dalton 1907 Millikan 1903 Rutherford 1900 Thomson 1913 Bohr

FROM DEMOCRITUS ATOM TO QUARKS · 2018. 11. 12. · Democritus When Who Technology Theory 400 B.C. Democritus He took a seashell and broke it in half. He then took half of it and

Atomic Models Through Time. Democritus @400 B.C. Theorized that if you were to cut something in half, then cut it in half again and again… Eventually

The Atomic Model - d18n8r6t2iitwf.cloudfront.net · But First, Democritus! Democritus was a Greek philosopher (470-380 B.C.) who is the father of modern atomic thought. He proposed

Chapter 5: Atomic Structure & The Periodic Table Democritus– 4 th century B.C., teacher in Greece, first suggested the existence of atoms, lacked experimental

Atoms and Their Structure Early Greek Theories 400 B.C. - Democritus crushed substances in400 B.C. - Democritus crushed substances in his mortar and

Mullis1 Democritus (460-370 B.C.) Democritus was one of a few Greek philosophers who believed that all matter in the world was made of of indivisible parts

The Atomic Model - madeonamac.com · Dalton Thomson Rutherford Bohr Chadwick Modern. But First, Democritus! Democritus was a Greek philosopher (470-380 B.C.) who is the father of

Democritus (460-370 B.C)

Aristotle Early Greek Theories 440 B.C. - Democritus thought matter could not be divided indefinitely. He called nature’s basic particle the “atom”, from

Models of the Atom a Historical Perspective Aristotle Early Greek Theories 400 B.C. - Democritus thought matter could not be divided indefinitely. 350

Atomic Structure. Atomic Theory Democritus (460-370 B.C.) –Greek philosopher –Democritus proposed that the world is made up of empty space and tiny particles

Democritus (460-370 B.C.)

Unit 2: Atomic Theory and Structure. (c. 400 B.C.) Democritus proposed that “atomos” are indivisible. Atom: smallest particle of matter that retains its

, who was from was the first person to use the term atom during B.C. Democritus defined the atom as being. opposed Democritus because believed that

Development of Atomic Theory 400 B.C. -Democritus was first to use the word : atom atomos meaning “indivisible” Aristotle (famous philosopher) disputed

Development of Atomic Theory. Democritus GREECE around 400 b.c. Democritus said: –47 The material cause of all things that exist is the coming together

Atomic Theory. Defining the Atom The Greek philosopher Democritus (460 B.C. – 370 B.C.) was among the first to suggest the existence of atoms (from the

Atomic Theory Atomic Theory The History of the Atom Original idea – Greek Democritus – 460 B.C. Thought there were ‘indivisible particles’ that everything

Atoms, Molecules, and Ions Defining the Atom The Greek philosopher Democritus (460 B.C. – 370 B.C.) was among the first to suggest the existence of atoms

Democritus Aristotle -400 B.C. - Coined the term “atom” -384-322 B.C. - Believed matter is continuous

Atomic Theory. Democritus The Greek philosopher Democritus (460 B.C. – 370 B.C.) was among the first to suggest the existence of atoms (from the Greek

Atomic Theory - North Bergen School District · But before all these guys there was Democritus Democritus was a Greek philosopher (470-380 B.C.) who is the father of modern atomic

States of matter - Warsaw University of Technologyadam.mech.pw.edu.pl/~marzan/introduction_solids.pdf · Aristoteles (350 b.c) : Matter as continuous medium Democritus (400 b.c.)

Atomic Theory Date. Democritus Date 460-370 B.C. Democritus was a philosopher; did no research He thought that everything was made up of tiny round things

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

Atomic Theory. History of Atomic Theory 400 B.C. The Greek philosopher Democritus proposed that matter is composed of relatively simple particles that

Atoms Atoms are basic building blocks of matter. Democritus- developed the theory that atoms made all matter in 450 B.C

Electrons in Atoms. Democritus (400 B.C.) Proposed that matter was composed of tiny indivisible particles Not based on experimental data Greek: atomos

Chapter 4 Atomic Structure Theories about matter were based on the ideas of Greek philosophers: Democritus (400 B.C. ) – coins the term “atom” saying

Timeline of Atomic Structure Marissa Kopelman. Democritus (460 B.C.-370 B.C.) Democritus, a Greek philosopher, believed that all matter was made up of