Vision Learning
Visionlearning: Chemistry: The Nature of the Chemical Bond
This site talks about ionic, polar covalent, and non-polar covalent bonding.
Science Struck
Science Struck: Halogen Family
Read about the non-metallic elements in the halogen family, what their chemical and physical properties are, their uses, and some interesting facts about them.
Florida-Spectrum Environmental Services
Florida Spectrum: Chemical Fact Sheet: Selenium
Nice detailed synopsis of selenium, its properties and uses.
Science Struck
Science Struck: Labeled Periodic Table of Elements With Names
Describes the organization of the periodic table of elements and the different groups in it.
Science Struck
Science Struck: Properties of Halogens
Looks at the chemical and physical properties of halogens.
Science Struck
Science Struck: Characteristics of Halogens
Learn about the characteristics, chemical and physical properties, and uses of halogens.