First to propose idea of atom Democritus. Wrote out the first four point atomic theory Dalton.

Slides:

Advertisements

Similar presentations

Honors Chemistry Chapters 3 & 4

Advertisements

Atomic Theory Timeline

The Structure of an Atom

Atomic Theory. Let’s Take a Trip Through Time! Atomic Theories Timeline Name Demo- critus DaltonThomsonRutherfordBohrSchrödinger Heisenberg Time Frame.

History of the Atom & Atomic Structure

Scientists that changed our view of the atom

Unit 2 – Atomic Theory Chapter 4 & 11.2 Unit Test:

Atomic Structure Section The Nucleus Nucleus- contains most of the mass of an atom – Protons & Neutrons contains most of an atom’s mass – Electrons-

Atomic Theory Agenda  What do you know about the atom? (whiteboard review)  Song – Atomic Theory Polka  Reading 4.2 & 4.3  Notes.

Atomic Theory Agenda New elements Grade tests Guided reading of chp 4

Atomic Theory Agenda Review Elements

Atomic Theory Polka!. Dalton Thomson Rutherford Bohr.

The Atom Section Notes.

Chapter 2 Atoms, molecules, and ions

10 pt 15 pt 20 pt 25 pt 5 pt 10 pt 15 pt 20 pt 25 pt 5 pt 10 pt 15 pt 20 pt 25 pt 5 pt 10 pt 15 pt 20 pt 25 pt 5 pt 10 pt 15 pt 20 pt 25 pt 5 pt History.

P. Sci. Unit 8 Chapter 4 Atoms.

Atomic Theory Atoms are incredibly small!

“Atomic Structure” Essential Question: Describe how the model of the atom has changed since the Greek idea of “Atomos”

Atomic History 3/23/15.

Atomic Theory Agenda  New elements  Grade tests  Guided reading of chp 4  Song about Atomic Theory  Notes on Atomic Theory.

Atomic Structure Objectives: History of an Atom Atomic Models

The Atomic Model Chem 9.

Development of our understanding of the atom. Early Models Democritus was first to suggest atom in 4 th century B.C. Believed matter was made of tiny.

The Parts of an Atom.

Chapter 4: Atomic Structure

Atomic Theory: the beginning Chapter 3 Part I. Democritus An Ancient Greek Theorized about the existence of atoms. Did not use Scientific Method.

Atomic Theory and Structure Chapters 4-5 Atomic Theories Democritus ~ 400 BC believed that atoms were indivisible and indestructible Dalton ~ 1800’s.

Chapter Overview The Structure of the Atom Chapter 4..\..\Movies\Atoms.MOV Early Theories of the Atom Subatomic Particles How Atoms.

Chemistry AI Chapter 4 A. Atom (Section 4.1) 1. Democritus (460B.C.-370B.C.) The smallest part of an element that retains its identity during a chemical.

Chapter 4 – The Atom Evolution of the Atomic Model Democritus (400 bc)

Unit EQ: How is Periodic Table arranged? Warm-up 9/27/10 What does the word periodic/period mean to you? What does the word periodic/period mean to you?

Go to section Chapter 4 Atomic Structure. Go to section History of Atom Democritus (2500 YEARS AGO) Greek philosopher –Atmos – “uncut” or “indivisible”

 Review  Movie  Notes  Homework. KK  Cu  Br  Xe.

The Structure of the Atom Chapter 3 Chemistry: Matter and Change.

Subatomic Particles Agenda   Review   GAME   Song   Notes   Guided practice   Homework.

Models of Atomic Structure

Evolution of the Atomic Theory. Greek Philosophy (400 BC) Democritus “All matter is made of atoms” Philosophy is knowledge gained only by observation.

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.

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

Bellwork 10/19/15 Tell me about one or more of your family traditions. Minimum 5 sentences.

MODERN CHEMISTRY CH 3 Atoms: The Building Blocks of Matter.

Agenda Elements/AT/Atoms, Ions, & Isotopes Homework Check Song Notes Go over Test Homework.

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

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

Agenda Review Elements Review Atomic Theory Song Atomic pictures Notes.

The Structure of the Atom

CP Chemistry Chapter 8 Atomic Theory Subatomic Particles Protons Protons Neutrons Neutrons Electrons Electrons.

Atomic Theory and Structure of the Atom. first to suggest the existence of atoms believed atoms were small indivisible particles Atom: smallest particle.

P. Sci. Unit 8 Chapter 4 Atoms. Atomic Structure – timeline Ancient Greece - Democritus proposed the atom – a tiny solid particle that could not be subdivided.

Atomic Structure Notes. Thomson Model The “pudding” had a positive charge and the “plums” had a negative charge.

Small individual particles that make up matter. This includes gases.

Atomic Structure.  Democritus (460 BC – 360 BC)  Ancient Greek philosopher ▪ No experiments performed!  Major Contribution: The Atom ▪ He proposed.

Smallest particle of an element that retains the properties of the element.

Ch. 3 - Atomic Structure Subatomic Particles – show powers of ten ect…..

History of the Atom. Atoms and Elements Any material that is composed of only one type of atom is called an element. An atom is the smallest particle.

Class Notes: Atomic Models. Democritus= 400 B.C. – said the world was made of two things: empty space and tiny particles called “atoms” --said atoms were.

 Atom: Smallest unit of an element that maintains the properties of that element.  Democritus: Believed that the atom could not be cut smaller. Aristotle.

Ch. 3 - Atomic Structure Subatomic Particles.

Physical Science Ch 4 Atoms (including some PC info)

The Changing Model of the Atom. Aristotle 400 BCE claimed that there was no smallest part of matter different substances were made up of different proportions.

Atoms, Molecules and Ions Chapter 2. Foundations of Atomic Theory _________________________________________ –Mass is neither created nor destroyed. The.

GPS 4 Atomic Theory Review. Match the scientist to the discovery, experiment or model.  Rutherford  Bohr  Heisenberg  Thomson  Mosley  Dalton 

1 The History of Atomic Theory A long and winding road Section 4.1.

Atomic Structure Objectives: History of an Atom Atomic Models

The Atom Chapters 4-5.

Atomic Theory Polka!.

How did we learn about the atom?

2.1 History of the Atom Objectives S1 and S2

X Chapter 4 Test Review The Atomic Theory.

Presentation transcript:

First to propose idea of atom Democritus

Wrote out the first four point atomic theory Dalton

Found the e - Thomson

Experimented with cathode ray tubes Thomson and Goldstein

Thomson’s plum pudding

Found the electrical charge of the e - Millikan

Did the oil drop experiment Millikan

Did the gold foil experiment Rutherford

Found the proton Goldstein

Found the nucleus Rutherford

Found the neutron Chadwick

Atomic Theory Polka Dalton, Thomson, Rutherford and Bohr. Schrödinger and Heisenberg, and many, many more. Used their brains to venture in the realm of inner space and found the world of the atom was a weird and wondrous place.

Dalton did experiments and said, “I think it’s clear, atoms are tiny indestructible spheres.”

Thomson worked with cathode rays and said, “I disagree. A plum-pudding model makes much more sense to me.” A new chapter in atomic theory started to unfold.

When Rutherford played around with atoms made of gold. When a few of his alpha particles came bounding back, he hypothesized a nucleus had knocked them off the track.

Dalton, Thomson, Rutherford and Bohr. Schrödinger and Heisenberg, and many, many more. Used their brains to venture in the realm of inner space and found the world of the atom was a weird and wondrous place.

Bohr saw spectral lines for hydrogen and said, “It seems to me.. Electrons move in orbits with specific energies.”

Heisenberg said, “Forget it, there’s no way to know the orbit or a path, where the electron’s gonna go.”

Schrödinger used lots and lots of fancy mathematics, and made a model of the atom based on quantum mechanics. It has orbitals and those are based on probability. The atom is a fuzzy blob of pure uncertainty.

Dalton, Thomson, Rutherford and Bohr. Schrödinger and Heisenberg, and many, many more. Used their brains to venture in the realm of inner space and found the world of the atom was a weird and wondrous place.

What do you know about atom?

How Atoms Differ Date:

Subatomic Particles  PROTONS  p +  In the nucleus  +1 charge  1 amu  ELECTRON  e -  In electron cloud  -1 charge  1 / 1840 amu  NEUTRON  n o  In the nucleus  No charge  1 amu

Atomic number  Used to arrange elements in PT by Mosley  # of PROTONS  # of ELECTRONS IF an ATOM

Isotopes  Atoms of the same element that differ in the # of neutrons

Atomic Mass  The weighted average of all isotopes.  Always a decimal (unless a man-made element)

Mass number  Mass of an isotope  Always a whole number – not on PT  # of PROTONS + NEUTRONS

Nuclide  Tells atomic # and mass # of an atom Na  Sodium-23 has ____ protons, ___ electrons and ____ neutrons

Practice

32 16 S

28 14 Si

14 6 C

Ions  Atoms with a charge

CATIONS  Cations are pawsitive and are written with a plus charge on the upper right.  LOST an e-, have more protons; therefore positive.  Charge indicates the number of electrons lost.  Hint: cation has a t which looks like +

ANIONS  Anions are negative and written with a negative charge on the upper right.  GAINED an e-, have more electrons; therefore negative.  Charge indicates number of electrons gained.

36 17 Cl -  _____ protons _____ neutrons _____ electrons

Practice

16 8 O -2

Ag +

80 35 Br -

Pb +4