Week Five Project

2. The 3 major parts of an atom
Proton
Neutron
Electron

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

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

5. The Proton
Protons are positively charged particles found in the
atomic nucleus. Protons were discovered by Ernest
Rutherford.
The proton has a relative mass of 1.000 amu and a
charge of +1.

6. The Neutron
Neutrons are uncharged particles found in the atomic
nucleus. Neutrons were discovered by James
Chadwick in 1932.
The neutron has a mass of 1.001 amu and a charge of
0.

7. The Electron
• Electrons are negatively charged particles that
surround the atom's nucleus. Electrons were
discovered by J. J. Thomson in 1897.
• Electrons determine the chemical properties of the
atom. Chemical reactions involve sharing or
exchanging electrons.
• Electrons have a charge of -1 and a mass of about .001
amu.

8. The 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.
• It occupies less than 1% of the volume of an atom.

9. An Isotope
Atoms that have the same number
of protons but different numbers
of neutrons

10. Diagram of Three Isotopes
Example:
http://education.jlab.org/glossary/isotope.html