Objectives
0 Students will explain that atoms are the smallest unit
of an element and are composed of subatomic
particles.
0 Students will analyze models of the scientific theory
of atoms.
0 Students will analyze models and describe the motion
of particles in solids, liquids, and/or gasses.
0 Students will explain matter.
Introduction/Task
0 The work of numerous scientists over the course of
thousands of years has led to the development of the
modern theory of atomic structure.
0 Individually or with a partner, create a poster that
shares the important contribution scientist made to
the development of atomic models and theories.
0 Begin your task by reading the following slides…
Atoms
0 Matter is anything that takes up space and has mass.
All matter is made of atoms.
0 Atoms are the basic building blocks of matter. They
make up everything around us; Your desk, the board,
your body, everything is made of atoms!
0 Atoms are too small to see without powerful
microscopes.
Atomic Structure
There are two basic components in every atom:
Electron Cloud
Nucleus
Subatomic Particles
Three subatomic particles make up every atom:
Subatomic Particle
Charge
Location
Proton
Positive (+)
Nucleus or “Core”
Neutron
No Charge (0)
Nucleus or “Core”
Electron
Negative (-)
Electron Cloud
Subatomic Particles
Electron Cloud:
• Electrons orbit the
nucleus.
Nucleus or “Core”:
• Protons and
Neutrons are found
in the nucleus.
An Atom
An atom looks like this!
Electron levels/cloud
Proton
Neutron
Present Day Model
Electron
Heisenberg
Schrodinger
This is a carbon
It’s time
we head back home!
atom
the future!
nuclues
Click the atom to send us to
Atomic Theory
Changes over time…
Atomic Theory
0 Because we can not see atoms, we use models to teach
and learn about atoms.
0 The atomic theory has changed over time as new
technologies have become available.
0 Remember: Scientific knowledge builds on past research and
experimentation.
Atomic Theory Timeline
Scientist
John
Dalton
Information
All matter is made of
atoms. Atoms are too small
to see, indivisible and
indestructible. All atoms of
a given element are
identical.
Model
Atomic Theory Timeline
Scientist
J.J
Thompson
Information
Discovered the negative
electron, and predicted that
there also must be a
positive particle to hold the
electrons in place.
Model
Atomic Theory Timeline
Scientist
Information
Ernest
Rutherford
Discovered the nucleus of an atom
and named the positive particles in
the nucleus “protons”. Concluded
that electrons are scattered in
empty space around the nucleus.
Model
Atomic Theory Timeline
Scientist
Information
Model
Neutrons
James
Chadwick
Discovered that neutrons were also
located in the nucleus of an atoms
and that they contain no charge.
Atomic Theory Timeline
Scientist
Neils
Bohr
Information
Concluded that electrons are
located in planet-like orbits
around the nucleus in
certain energy levels.
Model
Scientist
(Many
Scientists!)
The Modern
Atomic Theory
Information
Electrons do not orbit the
nucleus in neat planet-like
orbits but move at high
speeds in an electron cloud
around the nucleus.
Model
Poster Time!
Time to create your poster!
It must include the following:
__definition of matter
__carbon atom and labeled particles
__all scientists, their theories, and their atomic
models from this power point.
Be creative, colorful, neat, and organized!!
Rubric
Content
Work Quality & Effort
Style & Creativity
Time Management &
Behavior
Excellent (5 pts)
Excellent
Poster includes useful
and relevant information
on all required
components of matter,
atom structure, and the
scientist and atomic
model. Information is
well-organized and
accurate.
Good
(4 pts)
Good
Poster includes relevant
information on most
components of matter,
atom structure, and the
scientist and atomic
model. Information is
accurate.
Fair
Poor
(3/2 pts)
(1 pts)
Fair
Poor
Poster includes relevant
Poster does not include
information on some of
relevant information or
the components of
has few components of
matter, atomic structure,
matter, atom structure,
and the scientist and
and the scientist and
atomic model. Some
atomic model.
information is inaccurate
Information is poorly
and poorly organized.
organized and inaccurate.
Excellent
Good
Fair
The work done exceeds The work was done with
Work is done with fair
all expectations and
good effort that shows
effort, but the quality is
shows that the student(s)
what the student(s) is
still not what the
is proud of their work. It capable of accomplishing. student(s) is capable of. It
is clear that best efforts It is evident that time was is evident that the work
were put forth.
put into this poster.
was rushed.
Poor
Work is done with little
effort, which resulted in a
low quality poster. It is
evident that the work was
rushed and little time was
spent on the final poster.
Work is incomplete.
Excellent
Poster has an element of
creativity and style, and is
not just a list of facts.
Poster conveys a clear
understanding of the
topic.
Fair
Poster lacks clarity of
information, creativity
and neatness.
Poor
Poster does not convey a
clear understanding of
the subject matter and
there are many errors.
Poster is not creative.
Fair
The student(s) did not
work well on time
management, but did
alright with their
behavior.
Poor
The student(s) did not
work well on time
management and had
poor behavior.
Good
Poster is clear and
contains few mistakes.
Good creativity and
neatness.
Excellent
Good
The student(s) worked
The student(s) worked
great managing time and well on time management
did a stellar job with their and did a nice job with
behavior.
their behavior.