The learners will review the concepts of electromagnetic spectrum, properties of light, and the transition from ground to excited state of electrons in atoms. In laboratory groups, the students will identify the characteristic light...

By clicking on individuals elements, users can explore a broad range of information about the element, their reactions, their properties, their structures, and their histories.

Provides a great deal of elemental information about the chemical element holmium. There are audio files demonstrating the correct pronunciation of the element name, pictures showing the electron shells, information on isotopes,...

This study guide on lines and angles covers key terminology; line notation; parallel, perpendicular, and skew lines; and postulates and theorems about lines. It is available for download with free registration.

Here you will find a series of clear pages, dedicated to elemental information specific to the element of holmium. Pages include history, occurrence, biological action, and properties.

Set of tables from Chemicool summarizing many physical and chemical properties of rhodium.

Gives good basic information on rhodium, its history, sources, uses and properties.

An incredibly thorough source for information on nickel.

A site that has it all. This is probably the best place to start looking for information or data on osmium.

An oustanding source of information for all sorts of general information on palladium.

Great source of information on rhodium. Very thorough.

A great site for just about anything you could ever need or want to know about actinium.

An explanation of Markov Chains with examples, graphs, and diagrams throughout the process.

This simulation shows a simple band diagram for metals for Group 1A and 2A and the transition series. Each metal's valence orbitals combine to create a band that is responsible for the element's properties.

The Cultural Sites of Al Ain (Hafit, Hili, Bidaa Bint Saud and Oases Areas) constitute a serial property that testifies to sedentary human occupation of a desert region since the Neolithic period with vestiges of many prehistoric...

The Longobards in Italy, Places of Power, 568 - 774 A.D. comprises seven groups of important buildings (including fortresses, churches, and monasteries) throughout the Italian Peninsula. They testify to the high achievement of the...

Situated on the western slopes of the Mount Carmel range, the site includes the caves of Tabun, Jamal, el-Wad and Skhul. Ninety years of archaeological research have revealed a cultural sequence of unparalleled duration, providing an...