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12

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  • Ionic Compound

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    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)

  • A roughly cube shaped space craft with a communications dish and two large rectangular solar panels flying through space. Caption: It wouldn't be possible without ion propulsion.

    Ion propulsion might sound like science fiction, but engineers at NASA are using it to drive NASA’s "Dawn" spacecraft through the solar system. Learn how ion propulsion works and why it is the reason "Dawn" will be the first spacecraft ever to orbit two solar system bodies beyond Earth. Part of the “Crazy Engineering” series.

    (Source: DCMP)

  • Table Salt in Water

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    When sodium chloride dissolves in water, the positively charged sodium ions interact with the oxygen of water, and the negatively charged chlorine ions interact with the hydrogen of water.

    Figure 2.15 (OpenStax, Biology 2e) caption: When we mix table salt (NaCl) in water, it forms spheres of hydration around the ions.

    (Source: OpenStax)

  • Illustration of liquid being poured into a container with H2O. It is labeled NaOH. Caption: Sodium hydroxide is a bade made of sodium and hydroxide

    Solutions are classified as acidic or basic based on their hydrogen ion concentration relative to pure water. An acidic solution has a higher concentration of hydrogen ions, and a basic solution has a lower concentration of hydrogen ions. Other topics covered include chemical reaction basics, properties of acids and based, acid-base reactions, and other mixtures. Part of the "Chemistry" series.

    (Source: DCMP)

  • Function Groups: Carboxyl and Sulfhydryl

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    Carboxyl groups, which consist of a carbon with a double bonded oxygen and an upper O upper H group attached to a carbon chain, are able to ionize, releasing H positive ions into solution. Carboxyl groups are considered acidic. Sulfhydryl is a polar molecule.

    Figure 2.27 (OpenStax, Biology 2e) caption: These functional groups are in many different biological molecules. R, also known as R-group, is an abbreviation for any group in which a carbon or hydrogen atom is attached to the rest of the molecule.

    (Source: OpenStax)

  • Bonding

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    Blue and red spheres form a larger spherical shape. Caption: affects how they bond with other atoms.

    Part of the "Chemistry in Action" series. Describes and illustrates the process of chemical bonding through live action footage and animations. Provides an overview of the role atomic structure plays in the process of bonding. Provides examples of how chemical bonding, including ionic bonds, covalent bonds, and metallic bonds, affects the characteristics of matter. Introduces the following terminology: element, atomic structure, energy level, valence electrons, ionic bonds, crystal lattice, covalent bond, and metallic bond.

    (Source: DCMP)

  • 101-Mendelevium

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    3D model of the atom Mendelevium

    Mendelvium is a radioactive metal of the actinide series. It does not occur naturally and was first made in 1955 by bombarding einsteinium with helium ions.

    (Source: Library Lyna)

  • Function Group: Phosphate

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    Phosphate groups consist of a phosphorous with one double bonded oxygen and two upper O upper H groups. Another oxygen forms a link from the phosphorous to a carbon chain. Both upper O upper H groups in phosphorous can lose an H positive ion, and phosphate groups are considered acidic.

    Figure 2.27 (OpenStax, Biology 2e) caption: These functional groups are in many different biological molecules. R, also known as R-group, is an abbreviation for any group in which a carbon or hydrogen atom is attached to the rest of the molecule.

    (Source: OpenStax)

  • Complex diagram showing ADP and Potassium on one side of a cell wall and ATP synthase moving through the cell wall to the other side. Caption: The enzyme uses energy from the backflow of hydrogen ions

    Part of the "Visualizing Cell Processes" series. Includes the following modules on photosynthesis: "Chloroplast Structure," "Light Trapping by Chlorophyll," "Light–Dependent Reactions of Photosynthesis," and "The Light–Independent Reactions of Photosynthesis." Includes the following modules on cellular respiration: "Glycolysis and Fermentation," "Mitochondrion Structure," "Aerobic Respiration," "Krebs Cycle," "Electron Transport Chain," and "ATP synthesis."

    (Source: DCMP)

  • Function Groups: Amino and Carbonyl

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    Carbonyl groups, which consist of an oxygen double bonded to a carbon in the middle of a hydrocarbon chain, are polar. Amino groups, which consist of two hydrogens attached to a nitrogen, are able to accept H positive ions from solution, forming H subscript 3 baseline positive. Amino groups are considered basic.

    Figure 2.27 (OpenStax, Biology 2e) caption: These functional groups are in many different biological molecules. R, also known as R-group, is an abbreviation for any group in which a carbon or hydrogen atom is attached to the rest of the molecule.

    (Source: OpenStax)

  • 43-Technetium

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    3D model of the atom Technetium

    Technetium is a chemical element with the symbol Tc and atomic number 43. It is the lightest element whose isotopes are all radioactive, none of which is stable other than the fully ionized state of ⁹⁷Tc.

    (Source: Library Lyna)

  • The Sun

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    Blurry image of glowing orange dots. Caption: Five million tons of hydrogen fuse into helium every second.

    Our middle-aged sun has fascinated people throughout history, but only since the rocket age have scientists been able to document its life and the forces that sustain it. Explores sunspots, solar cycles, the birth of a solar storm, and the use of specialized spacecraft outside earth's ionosphere.

    (Source: DCMP)

Collections

3

Showing collections 1 to 3 of 3

  • Chemistry

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    • Simulation

    A collection of Chemistry related resources

    A collection containing 67 resources, curated by Benetech

  • Elements

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    • Text Document
    • 3D Model

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

    A collection containing 118 resources, curated by Library Lyna

  • Biology

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    • Audio File

    Biology related concepts

    A collection containing 59 resources, curated by Benetech