A metal sample of small tungsten pieces are held in a clear container with a coin sitting at the end near the container lid.

A labeled photo of a 2D xray diffractometer located at the University of Helsinki. The labeled parts include the beamstop, slits, sample, vacuum tube and image plate detector.

This photo shows a close up view of zinc, a metallic chemical element with the symbol Zn.

This site provides a brief biography of Joseph Louis Gay-Lussac (1778-1850 CE), noted for his contributions in physical and inorganic chemistry.

This question and answer site from The Math Forum with Dr. Math discusses the angle between two adjacent faces of an octahedron. Links are also provided for additional information on related subjects.

Interactive concept simulation demonstrates the nuclear fusion of deuterium and tritium inside a tokamak reactor.

[Free Registration/Login may be required to access all resource tools.] In the following online tutorial students will be able to determine the number of valence electrons for any element and draw an electron dot diagram for any atom....

[Free Registration/Login may be required to access all resource tools.] In this online tutorial students will explain the law of conservation of mass, the law of definite proportions, and the law of multiple proportions. They will also...

[Free Registration/Login may be required to access all resource tools.] In this online tutorial students will define a mixture and understand why mixtures are different than pure substances. They will classify mixtures as homogeneous or...

[Free Registration/Login may be required to access all resource tools.] Students investigate how all types of energy, including work, relate to each other and are conserved in a closed system.

Definition of chemical property and examples of the chemical properties of matter. [Free Registration/Login may be required to access all resource tools.]

[Free Registration/Login may be required to access all resource tools.] How and why beta decay occurs, its dangers, beta-minus and beta-plus decay and how to write a balanced nuclear equation for beta decay.

[Free Registration/Login may be required to access all resource tools.] Boyle's law and the relationship between the volume and pressure of a gas.

[Free Registration/Login may be required to access all resource tools.] Definition of deposition and examples of deposition in nature.

[Free Registration/Login may be required to access all resource tools.] Ionic bonds: How and why they form, and the role of energy in their formation.

[Free Registration/Login may be required to access all resource tools.] Solubility and how temperature and pressure affect it.

[Free Registration/Login may be required to access all resource tools.] Definition of evaporation, how it occurs, what affects its rate and evaporative cooling.

[Free Registration/Login may be required to access all resource tools.] Definition of and reasons for field study.

[Free Registration/Login may be required to access all resource tools.] Explains how and why gamma decay occurs, what gamma rays are, and why gamma radiation is the most harmful.

[Free Registration/Login may be required to access all resource tools.] Discusses the two different classes of hydrocarbons and their properties, uses and sources.

[Free Registration/Login may be required to access all resource tools.] Group 18 elements and their properties.

[Free Registration/Login may be required to access all resource tools.] Definition and an example of sublimation, and conditions under which sublimation of snow and ice occur.

[Free Registration/Login may be required to access all resource tools.] Biases against women and people of color in science, and contributions of women and people of color in science.

[Free Registration/Login may be required to access all resource tools.] Describes the law of conservation of energy and how energy is conserved in chemical reactions.