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144

Showing resources 141 to 144 of 144

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  • 80-Mercury

    • Image
    • Text Document
    • 3D Model
    3D model of the atom Mercury

    Mercury is a chemical element with the symbol Hg and atomic number 80. It is commonly known as quicksilver and was formerly named hydrargyrum. It is the only metallic element that is liquid at standard conditions for temperature and pressure.

    (Source: Library Lyna)

  • Flat metallic card with irregular shapes cut out and printed text on the bottom. Spanish captions.

    Due to the development of computers and the growing number of programmers who develop new and improved software, there has been a wave of illegal software use, known as piracy. Companies are making advances in technology and increasing the number of computer programmers in an effort to reduce piracy. This is the Free Software model.

    (Source: DCMP)

  • Ionic Compound

    • Image
    • 2.5D Tactile Graphic
    • PDF
    • Text Document
    A sodium and a chlorine atom sit side by side. The sodium atom has one valence electron, and the chlorine atom has seven. Six of chlorines electrons form pairs at the top, bottom and right sides of the valence shell. The seventh electron sits alone on the left side. The sodium atom transfers its valence electron to chlorines valence shell, where it pairs with the unpaired left electron. An arrow indicates a reaction takes place. After the reaction takes place, the sodium becomes a cation with a charge of plus one and an empty valence shell, while the chlorine becomes an anion with a charge of minus one and a full valence shell containing eight electrons.

    Figure 2.11 (OpenStax, Biology 2e) caption: In the formation of an ionic compound, metals lose electrons and nonmetals gain electrons to achieve an octet.

    (Source: OpenStax)

  • Cross section of earth showing deep fissures. Caption: separated by huge cracks running deep into the crust,

    As shown on the History Channel. Gold dates from the time of the supernova explosion that gave birth to the building blocks of our solar system. When it was created, the Earth included a tiny percentage of gold atoms, and over the aeons geologic processes have concentrated it into various nooks and crannies around the globe. The best of it is in the ancient Precambrian rocks in South Africa, where the deepest mines in the world extract it. In other regions of the world, gold can be gathered from younger sedimentary rocks that have been eroded off older Precambrian rocks. The American gold rush was this type of deposit. Now in Nevada, sedimentary rocks are leached on a truly vast scale to extract the gold.

    (Source: DCMP)

Collections

3

Showing collections 1 to 3 of 3

  • Elements

    • Image
    • Text Document
    • 3D Model

    3D models and images of the entire periodic table of elements

    A collection containing 118 resources, curated by Library Lyna

  • Chemistry

    • Video
    • Image
    • 2.5D Tactile Graphic
    • PDF
    • Text Document
    • Simulation

    A collection of Chemistry related resources

    A collection containing 67 resources, curated by Benetech

  • PhET Simulations

    • Simulation

    A collection of simulations from PhET.

    A collection containing 15 resources, curated by Charles LaPierre