Chemicool Periodic Table-
Produced by MIT student David Hsu, this periodic table is indeed cool!
Choose an element by typing its name or clicking on the periodic table. A
new page will load with a detailed list of the properties of that element.
Periodic Table of the Elements-
Click on this periodic table to get all sorts of information, including
history, properties, forms, uses, and costs of an element. This site was
produced by the Chemical Science and Technology Division of Los Alamos
WebElements- Perhaps the king of WWW periodic tables, this huge resource was created by
Mark Winter of the University of Sheffield, England. Clicking on an
element will bring you to an information menu that includes the element's
background, chemical data, crystallography, physical data, isotopes,
spectroscopy, electronic data, biological data, and geological data.
Learn about metals, ceramics, semiconductors, and polymers. Provided by
the University of Illinois's Materials Science and Engineering Department,
this site offers an introduction to classes of materials.
Read these fact sheets to learn about the chemistry of buckyballs, autumn
colors, ozone, fertilizers, and more. Professor Bassam Z. Shakhashiri
distributes these fact sheets to students in his general chemistry course
at the University of Wisconsin.
The Periodic Table of
This page provides you with a comic book reference to almost any element.
17.4 EVIDENCE FOR ATOMS
How Do We Know Any
In this lesson from The Particle
Adventure, you will learn about the experimental evidence that
supports the modern theory of the atom.
Maintained by Eastern University, this hypermedia tutorial provides
information on chemical bonds, molecular shapes, and molecular models.
Downloading the Chemscape
allows you to create and manipulate molecular structures.
of the Month-
Check out this site for a list of molecules viewable in HTML, Chime, Java,
and VRML. This page is maintained by the Chemistry Department at the
University of Bristol, England.
This is a nice introduction to chemical bonding, including ionic and
covalent compounds. This lesson comes from
student-created interactive guide to chemistry.
17.7 THE ATOMIC NUCLEUS
Rutherford's Model of the atom:Rutherford
proposed the nuclear model of the atom on the basis of his experimental
results of the scattering of alpha-particles by the atoms. In his
experiment alpha-particles emitted with speeds of about 2 x 107 m/s struck
a thin gold foil several thousand atomic layers thick. Most of the
alpha-particles pass undeflected through the foil, but some were scattered
at some angle. According to Rutherford's model of the atom, almost the
entire mass and the total positive charge of the atom are confined within
a very small part at the center of the atom. This part is known as the
nucleus of the atom and has a radius less than 10-12 cm which is small
compared to the radius of the atom (approx. 10-8 cm). The electron in the
atom revolves in orbits around this central core. The radii of these
orbits determine the atomic radii.
The Bohr Atom
Find out more about the structure of atoms in this lesson from
ChemWeb, an online introductory chemistry course. Topics include
subatomic particles, atomic numbers, and Avogadro's number.
The Particle Adventure-
Produced by the Particle Data Group, this site explains the current
theories of fundamental particles and forces.
Learn about the Bohr model of the atom with this QuickTime movie (7.5M).
Models of Electron
The arrangement of electrons in atoms can get quite complicated. Check out
this page for 3-D (VRML) models of electron orbitals.
Millikan's Oil Drop Experiment-
This QuickTime movie (9.1M) introduces Millikan's oil drop experiment,
which led to the determination of electron charge.
Electron Configuration and Periodicity-
How does the atomic structure of an element relate to its position in the
periodic table? Find out in this lesson from
ChemWeb, a student-created online chemistry course.
17.9 THE PHASES OF MATTER
Part of the
CHEMystery online guide, this page links to lessons covering the three
states of matter.
Phases of Matter-
Get the facts on the three states of matter in these lessons from
Suspension of Disbelief, a student-created chemistry site.