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Remixed from Customizable Atom Delux by roman_hegglin. Helium is a chemical element with symbol He and atomic number 2. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas, the first in the noble gas group in the periodic table. Its boiling point is the lowest among all the elements.
(Source: OpenStax)
Iodine is a chemical element with the symbol I and atomic number 53. The heaviest of the stable halogens, it exists as a lustrous, purple-black non-metallic solid at standard conditions
(Source: Library Lyna)
Aluminium is a chemical element with the symbol Al and atomic number 13. It is a silvery-white, soft, non-magnetic and ductile metal. By mass, aluminium is the most abundant metal in the Earth's crust.
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.
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.
Some chemical reactions happen spontaneously, like metal rusting. Other reactions are non-spontaneous and need to absorb energy in order to occur. Using the Second Law of Thermodynamics, the principle of entropy, and the calculation of Gibbs free energy, scientists can predict which reactions will occur and vary the conditions to make more of the desired products. In equilibrium reactions, both products and reactants are always present. Equilibrium reactions in the human body are essential for life and can be exploited in chemical manufacturing as well. Part of the series Chemistry: Challenges And Solutions.
(Source: DCMP)
Conservation scientist Glen Gates at the Walters Art Museum in Baltimore is working on new ways to protect museum-quality silver from the ravages of time. Fine silverware and silver pieces on display at museums are exposed to air and tarnish. Every time someone polishes the silver, even under the careful supervision of conservation experts, a little bit of the silver wears away. Gates and colleague, Physics professor Ray Phaneuf at the University of Maryland, are working on a non-destructive method to preserve silver artifacts. With support from the National Science Foundation, they’re developing a nanometer-thick transparent coating that seals the silver. This coating keeps silver from tarnishing and eliminates the need to polish it.
Microorganisms affect everyone. Some are helpful, while others are harmful. Explores pathogenic microorganisms that can cause diseases like sore throats, influenza, tuberculosis, and HIV; decomposer microorganisms that decay rotting plant and animal matter, returning important nutrients back into the soil; and microorganisms that are also being used in the fuel industry to develop new nonpetroleum based products. Overviews food spoilage microorganisms such as mold that can ruin stored food. Explains other bacteria and yeasts are vital to the production of food and drinks like yogurt and bread, along with beer and wine. Examines where they come from and some examples of positive uses relating to many foods we eat.
Shows the combustion of magnesium, a thermite reaction to form iron, and the chemical reactions of sodium and potassium with water.
Lab experiments show how magnesium, zinc, iron, and copper react with hydrochloric and nitric acids. Also shows the displacement of two metals from salts.
Experiments feature: (1) halogens as oxidizing agents, (2) bromine reacting with potassium, (3) detecting bromine in compounds, (4) combustion of sulphur and the formation of sulfuric acid, (5) properties of phosphorus, and (6) spontaneous ignition of white phosphorus.
European farmers no longer import some of their food because they have high efficiency farms and a food surplus. Because of this, some farmland has been set aside for nonfood crops, such as timber, oil-producing seeds, sports grasses, and plants and animals from which clothes are made. This British production shares creative and innovative uses of land formerly kept only for food crops.
It is important to properly dispose of metals for the safety of people and the environment. Due to potential contamination problems, environmental programs focus on the recycling, reusing, and reducing of metals.
Features a wide variety of video footage, photographs, diagrams and colorful, animated graphics and labels. Begins with a simple definition, and this helps clarify pronunciation and provides opportunities to transfer words from working to long-term memory. Also concludes with a critical thinking question. For this particular clip, students will focus on nonliving.
Animals have contributed to scientific advancements, but how ethical is it to use them in research? Viewers explore the legal and ethical issues concerning the use of animals in research. Part of the "Core Concepts in Psychology" series.
Every portable electronic device is fueled by chemistry, specifically through oxidation-reduction or redox reactions. In redox reactions, one compound gains electrons (reduction) and one compound loses them (oxidation). Chemists can set up reactions so that electrons are forced to move in a certain way to create an electrical current. Metals often play a key role in redox reactions, which are essential to all aspects of chemistry, particularly in many biochemical processes. Part of the series Chemistry: Challenges And Solutions.
Host Emily Graslie discusses harmful plants related to the holiday season. Some of the plants highlighted include mistletoe, poinsettia, holly, and pine. Part of "The Brain Scoop" series. Please note this title makes references to plant and human reproduction.
Yttrium is a chemical element with the symbol Y and atomic number 39. It is a silvery-metallic transition metal chemically similar to the lanthanides and has often been classified as a "rare-earth element".
Rhodium is a chemical element with the symbol Rh and atomic number 45. It is an ultra-rare, silvery-white, hard, corrosion-resistant, and chemically inert transition metal. It is a noble metal.
Showing collections 1 to 3 of 3
3D models and images of the entire periodic table of elements
A collection containing 118 resources, curated by Library Lyna
A collection of Chemistry related resources
A collection containing 67 resources, curated by Benetech
A collection of simulations from PhET.
A collection containing 15 resources, curated by Charles LaPierre
