Download Atomic Timeline

SEMESTER 2 EXTRA CREDIT PROJECT: ATOMIC TIMELINE
DUE DATE: April 21, 2017
**NOTE**
**THIS IS A 50 POINT PROJECT…IT IS AN EXTRA CREDIT ASSIGNMENT**
Your task is to complete a BOOKLET or POWERPOINT SLIDE SHOW or TIMELINE to represent
the changes in Atomic Theory that have occurred over the past 300 years.
WHAT TO DO:
 Write the year on the top of each page in your booklet or slide presentation (there will
be 6 PAGES).
 Use textbook pages 125 – 128 to find the date for each discovery in the table on the
other side of this paper
**NOT EVERYTHING WILL BE IN THE BOOK. YOU MAY HAVE TO FIND SOME
INFORMATION FROM OTHER SOURCES**
 The theories are listed on the other side of this paper. Determine the year each theory is
associated with. (REMEMBER THAT THERE MAY BE SEVERAL THEORIES FOR EACH YEAR LISTED).
 On each year’s page, write or print all theories for that time frame.
 On each year’s page, draw a picture of what the scientists believed an atom looked like
at the time.
 On each year’s page, write the name of the scientist associated with that theory.
EXAMPLE:
EARLY 1800’S
Believed that atoms were
smooth and solid, like a billiard
ball
SCIENTIST: JOHN DALTON
 Decorate the cover and put your name, date and period on the back of your book
SCORING CRITERIA:
PAGE COMPONENTS
-Theories on correct pages
-Creativity (Neatness & Effort)
-Cover page
-Image of what atom was believed to look like
-Correct scientist for each theory
-Date
POINTS
20
6
6
6
6
6
DATES FOR EACH PAGE: (one per page)






Early 1800’s
1897
1911
1913
1920s
1932
SCIENTISTS (one per page):
 BOHR
 DALTON
 THOMSON
 CHADWICK
 RUTHERFORD
 VARIOUS SCIENTISTS
THEORIES: (there may be several on one page)
There are small, negatively charged particles
inside an atom
Most of an atom’s mass is in the tiny,
positively charged nucleus
An atom’s positive charge must be clustered
in a tiny region in its center
The energy of each electron keeps it in
motion around the nucleus
Atoms must contain some sort of positive
charge
Atoms are mostly empty space
Electrons of different energy levels are likely
to be found in different places
Electrons move only in certain orbits
Atoms cannot be created or destroyed
Electrons can be anywhere in a cloudlike
region around the nucleus
At the center of the atom is a tiny, massive
nucleus containing protons and neutrons.
Elements combine in specific proportions to
form compounds
A particle with no charge, called a neutron,
was discovered
Atomic model resembled layers of an onion,
or planets circling the sun
Cloud model
Modern Atomic Theory
All elements are made of atoms that cannot
be divided
The structure of an atom was like a blueberry
muffin
Atoms of the same element are exactly alike
The gold foil experiment was conducted