The document discusses the basic structure of an atom including its three main parts: protons, neutrons and electrons. It describes each part in detail, noting that protons and neutrons are located in the central nucleus while electrons surround it. The document also explains models of atomic structure including the electron cloud model which depicts electrons as existing in cloud-like regions around the nucleus.

1. Atomic Structure
CHRISTIAN SATUR
AND
AIRON SORINO

2. What are the 3 major parts of an
atom?
 Proton
 Neutron
 Electron

3. Draw a diagram showing the
location of each part of the atom.
http://www.eskom.co.za/nuclear_energy/fuel/fuel.html

4. Draw a diagram showing the
location of each part of the atom.
See more diagrams at:
http://www.bmb.psu.edu/courses/bisci004a/chem/basechem.htm

5. Draw a diagram showing the
location of each part of the atom.
http://www.bmb.psu.edu/courses/bisci004a/chem/atoms.jpg

6. Draw a Diagram of an Atom

7. Draw a diagram showing the
charges of each part of the atom.

8. Describe Proton
 Protons are positively charged particles found
in the atomic nucleus. Protons were discovered
by Ernest Rutherford..
 Experiments done in the late 1960's and early
1970's showed that protons are made from
other particles called quarks. Protons are made
from two 'up' quarks and one 'down' quark.

9. Describe Neutron
 Neutrons are uncharged particles found in the
atomic nucleus. Neutrons were discovered by
James Chadwick in 1932.
 Experiments done in the late 1960's and early
1970's showed that neutrons are made from
other particles called quarks. Neutrons are
made from one 'up' quark and two 'down'
quarks.

10. Describe Electron
Electrons are negatively charged particles that
surround the atom's nucleus. Electrons were
discovered by J. J. Thomson in 1897.
Electrons determine properties of the atom.
Chemical reactions involve sharing or
exchanging electrons.

11. Describe Nucleus
The nucleus is the central part of an atom. It is
composed of protons and neutrons.
The nucleus contains most of an atom's mass.
It was discovered by Ernest Rutherford in 1911.

12. Describe Quark
 Believed to be one of the basic building blocks of
matter. Quarks were first discovered in experiments
done in the late 1960's and early 1970's.
 Three families of quarks are known to exist. Each
family contains two quarks. The first family consists
of Up and Down quarks, the quarks that join together
to form protons and neutrons.
 The second family consists of Strange and Charm
quarks and only exist at high energies.
 The third family consists of Top and Bottom quarks
and only exist at very high energies.

13. Describe Isotope
Atoms that have the same number of
protons but different numbers of
neutrons

14. Describe Isotope
Example:
http://education.jlab.org/glossary/isotope.html

15. What is the Electron Cloud Model?
Model of the atom pictures the electrons moving around
the nucleus in a region called an electron cloud.
The electron cloud is a cloud of varying density
surrounding the nucleus. The varying density shows
where an electron is more or less likely to be. Atoms
with electrons in higher energy levels have additional
electron clouds of different shapes that also show
where those electrons are likely to be.
For more information, click here:
http://regentsprep.org/Regents/physics/phys05/catomodel/cloud.htm

16. What is the Electron Cloud Model?
Diagram 1:

17. What is the Electron Cloud Model?
Diagram 2: