Early work #5:
Draw your best diagram of what
you think is an atom. (Just try!)
Some people draw an atom like this
http://www.eskom.co.za/nuclear_energy/fuel/fuel.html
Atom showing charges
Atomic Structure
What are the 3 major parts of an
atom?
What are the 3 major parts of an
atom?
• Proton
• Neutron
• Electron
Describe Proton
Protons
Write this down under the Proton flap.
• Much larger/heavier than electrons
• Protons have a positive charge (+)
• Located in the nucleus (middle) of the
atom
Describe Neutron
Neutrons
• Write this down under the Neutron flap.
• Large and heavy like protons
• Neutrons have no electrical charge
• Located in the nucleus of the atom
Describe Electron
Electron
Write this down under the Electron flap.
• Tiny, very light particles
• Have a negative electrical charge (-)
• Move around the outside of nucleus in
very specific energy shells
Describe Nucleus
Nucleus
Write this down under the Nucleus flap.
• Nucleus is central part of atom.
Composed of protons and neutrons.
• Nucleus contains most of an atom's
mass.
Sooner or later every one of us breathes
an atom that has been breathed
before by anyone you can think of who
has lived before usMichelangelo or George Washington or
Moses.
Jacob Bronowski
Element Key
• Write this down inside the foldable.
• Take notes as
6
directed.
C
Carbon
12.0
The innermost shell closest to the
nucleus can only contain how many
electrons?
The innermost shell can only
contain how many electrons?
• Models of an atom pictures electrons
moving around the nucleus in a region
called an electron cloud.
• The first energy shell contains TWO
electrons. That’s it!
For more information, click here:
http://regentsprep.org/Regents/physics/phys05/catomodel/cloud.htm
How many electrons can the
second energy level contain?
It can contain up to 8 electrons.
Describe Isotope
• Atoms that have the same
number of protons but different
numbers of neutrons
Describe Isotope
Example:
http://education.jlab.org/glossary/isotope.html
Matter &
The Atom
What is matter?
The term matter describes all of the
physical substances around us: your
table, your body, a pencil, water, and
so forth
Matter
• Anything that has
mass and takes up
space (has volume)
• Made up of different
kinds of atoms
Matter
• Includes all things
that can be seen,
tasted, smelled, or
touched
• Does not include
heat, sound, or light
What is matter made of?
• Matter is made of atoms
Why use models?
Models are often used for
things that are too small or too
large to be observed or that
are too difficult to be
understood easily
Models
• In the case of atoms, scientists use large
models to explain something that is very
small
• Models of the atom were used to explain
data or facts that were gathered
experimentally.
• So, these models are also theories
Study for your test