Transcript
Page 1: The Atomic Theory Timeline Project - harrischemistry.com Theory Timeline... · Rutherford-Bohr model e. Planetary model ... John Cockcroft, Ernest Walton . Paul Dirac ** James Chadwick

The Atomic Theory Timeline Project

www.harrischemistry.com

To help you piece together the story of what we know about the atom, you will be creating a timeline depicting the development of the scientific model of the atom. It has been through debates by ancient philosophers and new discoveries by physicists and chemists over the past 2500 years that our understanding of the atom has developed. Your assignment is to research the major contributors and significant discoveries that have impacted the atomic model and develop a timeline.

DUE DATE: __________________________________

Your timeline must:

1. Include AT LEAST 3 scientists from each of the following time periods. There are more than 3 scientists in each time period. For each scientist included provide their name, dates of birth and death, country of origin, year of discovery and contribution.

a. Ancient Greek/Roman/Asian/African philosophers b. 466-1700 c. 1700-1800 d. 1800-1875 e. 1875-1900 f. 1900-1915 g. 1915-2012

2. Include the following pictorial models of the atom along with an explanation of the model including the date developed:

a. Small, spherical, solid, indivisible model b. Electron cloud model c. Plum pudding model d. Rutherford-Bohr model e. Planetary model

3. Contain 3 major world events in each time period: a. Ancient b. 500-1800 c. 1800-1875 d. 1875-1900 e. 1900-1915 f. 1915-1950 g. 1950-2012

4. Be chronological in its sequence, with the dates clearly shown although it need not be to scale. Place the world events on top of the timeline, and the scientists on the bottom of the timeline. Make sure that the data you select is appropriate and significant for each time period.

5. Be neat and legible.

Page 2: The Atomic Theory Timeline Project - harrischemistry.com Theory Timeline... · Rutherford-Bohr model e. Planetary model ... John Cockcroft, Ernest Walton . Paul Dirac ** James Chadwick

The Atomic Theory Timeline Project

www.harrischemistry.com

List of scientists with contributions to the modern atomic theory:

**Democritus

Aristotle

Antoine Lavoisier

Charles-Augustin deCoulomb

Sir Isaac Newton

**John Dalton

Michael Faraday

Julius Plucker

Dmitri Mendeleev

James Clerk Maxwell

George Johnstone Stoney

Sir William Crookes

Eugen Goldstein

**Wilhelm Röentgen

**Henri Becquerel

**Joseph John Thomson

**Ernest Rutherford

**Marie Curie

Max Planck

Albert Einstein

**Robert Millikan

Frederick Soddy

Hantaro Nagaoka

Richard Abegg

Hans Geiger

**Erwin Schröedinger

Henry Moseley

Francis William Aston

**Niels Bohr

**Werner Heisenberg

Louis de Broglie

John Cockcroft, Ernest Walton

Paul Dirac

**James Chadwick

Lise Meitner, Otto Hahn, Fritz Strassman

Glenn Seaborg

Enrico Fermi

Murray Gell-Mann, George Zweig

**These scientists must be included.