Atoms. Greek Atomic Model Democritus (400 BC)Democritus (400 BC) Named the atomNamed the atom Atom...

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Atoms

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Transcript of Atoms. Greek Atomic Model Democritus (400 BC)Democritus (400 BC) Named the atomNamed the atom Atom...

Page 1: Atoms. Greek Atomic Model Democritus (400 BC)Democritus (400 BC) Named the atomNamed the atom Atom cannot be dividedAtom cannot be divided.

Atoms

Page 2: Atoms. Greek Atomic Model Democritus (400 BC)Democritus (400 BC) Named the atomNamed the atom Atom cannot be dividedAtom cannot be divided.
Page 3: Atoms. Greek Atomic Model Democritus (400 BC)Democritus (400 BC) Named the atomNamed the atom Atom cannot be dividedAtom cannot be divided.

Greek Atomic Greek Atomic ModelModel

•Democritus (400 BC)Democritus (400 BC)•Named the atomNamed the atom•Atom cannot be Atom cannot be divideddivided

Page 4: Atoms. Greek Atomic Model Democritus (400 BC)Democritus (400 BC) Named the atomNamed the atom Atom cannot be dividedAtom cannot be divided.

Dalton’s Dalton’s AtomicAtomic Theory Theory•18031803

•All elements are composed All elements are composed of atoms (not divisible)of atoms (not divisible)

•Atoms of same element are Atoms of same element are the samethe same

•Atoms of different Atoms of different elements are differentelements are different

Page 5: Atoms. Greek Atomic Model Democritus (400 BC)Democritus (400 BC) Named the atomNamed the atom Atom cannot be dividedAtom cannot be divided.

Thomson’s Thomson’s ModelModel

•18971897•Atom has smaller parts, Atom has smaller parts, like electronslike electrons

•Atom made of a positive Atom made of a positive pudding-like material with pudding-like material with negatively charged negatively charged electrons scattered electrons scattered throughoutthroughout

Page 6: Atoms. Greek Atomic Model Democritus (400 BC)Democritus (400 BC) Named the atomNamed the atom Atom cannot be dividedAtom cannot be divided.

Rutherford’s Rutherford’s ModelModel

•19111911•Positive-charged Positive-charged particles in the nucleusparticles in the nucleus

•Negative scattered Negative scattered around edgesaround edges

•Gold foil experimentGold foil experiment

Page 7: Atoms. Greek Atomic Model Democritus (400 BC)Democritus (400 BC) Named the atomNamed the atom Atom cannot be dividedAtom cannot be divided.

Rutherford’s Rutherford’s ExperimentExperiment

Page 8: Atoms. Greek Atomic Model Democritus (400 BC)Democritus (400 BC) Named the atomNamed the atom Atom cannot be dividedAtom cannot be divided.

Bohr’s Bohr’s ModelModel

•19131913•Electrons move in definite Electrons move in definite orbits around the nucleus orbits around the nucleus (like the planets move (like the planets move around the sun)around the sun)

•Energy levels located a Energy levels located a certain distance from the certain distance from the nucleusnucleus

Page 9: Atoms. Greek Atomic Model Democritus (400 BC)Democritus (400 BC) Named the atomNamed the atom Atom cannot be dividedAtom cannot be divided.

Compare the Compare the Thomson to the Thomson to the Rutherford/BohrRutherford/Bohr

Page 10: Atoms. Greek Atomic Model Democritus (400 BC)Democritus (400 BC) Named the atomNamed the atom Atom cannot be dividedAtom cannot be divided.

Wave Wave TheoryTheory

•Modern modelModern model•Electrons do not travel Electrons do not travel in definite pathsin definite paths

•Think electron cloudThink electron cloud

Page 11: Atoms. Greek Atomic Model Democritus (400 BC)Democritus (400 BC) Named the atomNamed the atom Atom cannot be dividedAtom cannot be divided.

Atomic StructureAtomic Structure

Page 12: Atoms. Greek Atomic Model Democritus (400 BC)Democritus (400 BC) Named the atomNamed the atom Atom cannot be dividedAtom cannot be divided.

Subatomic Subatomic ParticlesParticles

• protons = positive charge (+)protons = positive charge (+)• electrons = negative charge (-)electrons = negative charge (-)• neutrons = neutral (0 charge)neutrons = neutral (0 charge)

Page 13: Atoms. Greek Atomic Model Democritus (400 BC)Democritus (400 BC) Named the atomNamed the atom Atom cannot be dividedAtom cannot be divided.

Subatomic Subatomic ParticlesParticles

Page 14: Atoms. Greek Atomic Model Democritus (400 BC)Democritus (400 BC) Named the atomNamed the atom Atom cannot be dividedAtom cannot be divided.

Lithium AtomLithium Atom

•How many How many protons?protons?

•How many How many electrons?electrons?

•How many How many neutrons?neutrons?

Page 15: Atoms. Greek Atomic Model Democritus (400 BC)Democritus (400 BC) Named the atomNamed the atom Atom cannot be dividedAtom cannot be divided.

Atomic NumberAtomic Number

• identifies the element on the identifies the element on the periodic tableperiodic table

• equals the # of protons in the equals the # of protons in the nucleusnucleus

Page 16: Atoms. Greek Atomic Model Democritus (400 BC)Democritus (400 BC) Named the atomNamed the atom Atom cannot be dividedAtom cannot be divided.

Atomic MassAtomic Mass

• sum of the # of protons + # of sum of the # of protons + # of neutrons in the nucleusneutrons in the nucleus

• changes with isotopeschanges with isotopes

Page 17: Atoms. Greek Atomic Model Democritus (400 BC)Democritus (400 BC) Named the atomNamed the atom Atom cannot be dividedAtom cannot be divided.

IsotopesIsotopes• atoms of the same elementatoms of the same element• same # of protonssame # of protons• different # of neutronsdifferent # of neutrons• different atomic mass different atomic mass • examples = hydrogen, carbon, examples = hydrogen, carbon,

uraniumuranium

Page 18: Atoms. Greek Atomic Model Democritus (400 BC)Democritus (400 BC) Named the atomNamed the atom Atom cannot be dividedAtom cannot be divided.

IsotopesIsotopes

Page 19: Atoms. Greek Atomic Model Democritus (400 BC)Democritus (400 BC) Named the atomNamed the atom Atom cannot be dividedAtom cannot be divided.

Electron Electron CloudCloud• electrons move electrons move

about the about the nucleus locked nucleus locked in a certain in a certain area of the area of the electron cloudelectron cloud

• location called location called energy levelsenergy levels

Page 20: Atoms. Greek Atomic Model Democritus (400 BC)Democritus (400 BC) Named the atomNamed the atom Atom cannot be dividedAtom cannot be divided.

Electron ShellsElectron Shells

Page 21: Atoms. Greek Atomic Model Democritus (400 BC)Democritus (400 BC) Named the atomNamed the atom Atom cannot be dividedAtom cannot be divided.

# of electrons in # of electrons in each orbital shelleach orbital shell• electrons electrons

with low with low energy energy are found are found in the in the energy energy level level closest to closest to the the nucleusnucleus


Democritus: The Atom (around 400 BCE) Democritus thought matter could be divided into smaller and smaller pieces until a single indivisible particle is.

Democritus: The Atom (around 400 BCE) Democritus thought matter could be divided into smaller and smaller pieces until a single indivisible particle is.

Chemistry 11 Early Models of the Atom. Ancient Greeks were the first to come up with the idea of atoms. Democritus Democritus suggested that all matter.

Chemistry 11 Early Models of the Atom. Ancient Greeks were the first to come up with the idea of atoms. Democritus Democritus suggested that all matter.

Discovery of the Atom. Democritus Democritus was an ancient Greek who had a philosophical idea of an atom. His approach was not based on the scientific.

Discovery of the Atom. Democritus Democritus was an ancient Greek who had a philosophical idea of an atom. His approach was not based on the scientific.

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,

Note Packet for Students - Loudoun County Public Web viewUnit 2- The Atom. Notes. DEMOCRITUS. ... 4.What was Democritus’ word for something that cannot be cut? ... that allowed physics

Note Packet for Students - Loudoun County Public Web viewUnit 2- The Atom. Notes. DEMOCRITUS. ... 4.What was Democritus’ word for something that cannot be cut? ... that allowed physics

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

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

THE STRUCTURE OF THE ATOM - Parkway · PDF file1 the structure of the atom atomic models pioneers of the atom •democritus •lavoisier •dalton •thompson •rutherford •bohr

THE STRUCTURE OF THE ATOM - Parkway · PDF file1 the structure of the atom atomic models pioneers of the atom •democritus •lavoisier •dalton •thompson •rutherford •bohr

theory atomic democritus rutherford bohr e instein newton law theory atomic atom

theory atomic democritus rutherford bohr e instein newton law theory atomic atom

Atomic History 3/23/15. Democritus Theories ·The first known idea of the atom was proposed by this Greek philosopher ·According to Democritus, all matter.

Atomic History 3/23/15. Democritus Theories ·The first known idea of the atom was proposed by this Greek philosopher ·According to Democritus, all matter.

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

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

History of the Atom - Physics Super Brain! - · PDF file · 2016-09-20History of the Atom Scientists and Their Contribution to the Model of an Atom. Democritus ... Thomson atomic

History of the Atom - Physics Super Brain! - · PDF file · 2016-09-20History of the Atom Scientists and Their Contribution to the Model of an Atom. Democritus ... Thomson atomic

The Development of a Modern Theory of the Atom Aristotle Democritus.

The Development of a Modern Theory of the Atom Aristotle Democritus.

The History of the Atom From Democritus to Today’s Modern Theory.

The History of the Atom From Democritus to Today’s Modern Theory.

Greek philosophers (300 BC) proposed matter was made of 4 elements: earth, air, fire, water. Democritus coined the word “atom” meaning “cannot be.

Greek philosophers (300 BC) proposed matter was made of 4 elements: earth, air, fire, water. Democritus coined the word “atom” meaning “cannot be.

1 History and Structure of the Atom From Democritus to...

1 History and Structure of the Atom From Democritus to...

The Atom Real life’s Legos®. Democritus, the Giggler Democritus, known in antiquity as the ‘laughing philosopher’ because of his emphasis on the value.

The Atom Real life’s Legos®. Democritus, the Giggler Democritus, known in antiquity as the ‘laughing philosopher’ because of his emphasis on the value.

Ch. 4: Atomic Structure 4.1 Defining the Atom Democritus, Dalton atomic theories 4.2 Structure of the Nuclear Atom proton, neutron, electron, plum pudding.

Ch. 4: Atomic Structure 4.1 Defining the Atom Democritus, Dalton atomic theories 4.2 Structure of the Nuclear Atom proton, neutron, electron, plum pudding.

1. The Greek philosopher Democritus coined what word for a tiny piece of matter that cannot be divided? A. element B. atom C. electron D. molecule.

1. The Greek philosopher Democritus coined what word for a tiny piece of matter that cannot be divided? A. element B. atom C. electron D. molecule.

Models of the Atom Humans Try Lots Of Ideas. A Greek philosopher, Democritus, lived about 2500 years ago. He suggested that matter cannot be divided indefinitely,

Models of the Atom Humans Try Lots Of Ideas. A Greek philosopher, Democritus, lived about 2500 years ago. He suggested that matter cannot be divided indefinitely,

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.