background preloader

The Photographic Periodic Table of the Elements

The Photographic Periodic Table of the Elements
Related:  kemiLaboratorio di scienze

WATCH: The chemistry of a smartphone Do you know what goes into an iPhone 6, or any smartphone for that matter? This video pulls out the periodic table and identifies the dozens of chemical elements lurking inside a smartphone so its battery can run and its screen can be strong, colourful and touchable. Thanks to patent laws and trade secrets, there's precious little information available about what goes into manufacturing your typical smartphone, but with the help of the Compound Interest blog, the American Chemical Society's YouTube channel Reactions has done some investigating. First off, each smartphone will contain 300 milligrams of silver and 30 milligrams of gold. As for the screen, it might look like any ordinary piece of glass, but your smartphone screen contains some of the rarest elements on Earth. Apple has bragged about its ion-stregenthed glass. Watch the video above to find out what other chemical elements are contained in your smartphone, including what you'd see if you'd smashed yours open.

10 Incredible Chemical Reaction GIFs Explained We encounter thousands of chemical reactions every day: plants use them in photosynthesis, metals rust over time, and combustion reactions provide us with heat and light, among thousands of other daily uses. Chemical reactions occur when reactants transform into new substances, called products, through creating and breaking bonds between atoms. Sometimes the process creates some pretty wild effects. Check out our top 10 chemical reactions below: 1) Disintegration (Mercury Reacts with Aluminum) Image credit: Theodore Gray via Youtube When aluminum rusts, it creates a protective oxide layer that prevents the aluminum atoms underneath from further rusting. 2) Pharaoh's Serpent (Mercury (II) Thiocyanate Reacts with Oxygen) Image credit: tenkowal via Youtube The reaction depicted above, nicknamed the "Pharoah's Serpent," actually use to be a common classroom demonstration. 3) Explosive Gummi Bear (Heated Potassium Chlorate Reacts with a Gummi Bear) Image credit: ebaum via ebaumsworld.com

GNU XaoS - GNU XaoS XaoS is an interactive fractal zoomer. It allows the user to continuously zoom in or out of a fractal in a fluid, continuous motion. This capability makes XaoS great for exploring fractals, and it’s fun! If you don’t know what fractals are, don’t worry. XaoS includes many animated tutorials that make learning about fractals fun and easy. XaoS can display many different fractal types, including Mandelbrot, Barnsley, Newton, Phoenix, and many more. XaoS currently runs on Windows, Mac OS X, Linux, and other Unix-like systems. XaoS is free software, licensed under the GPL.

Produit du jour - Société Chimique de France L'Actualité Chimique Société Chimique de France a Antoine-Laurent de Lavoisier (1743-1794) - Azote - Aspirine - Argent - Aluminium - Acide sulfurique - Arsenic - Acétylène - Aspartame, et autres sucrettes… - Amidon - Ammoniac - Adrénaline - Aciers inoxydables - Amphétamines - Antimoine - Acide acétique - Acide oléique - Azoture de sodium - Acide nitrique - Acide chlorhydrique - Aromasine, inhibiteur suicide - Acide méthanoïque - Acétates - Alumine - Acétone - ATP et précurseurs - Aniline - Aoûthyste - ADN - Acide phosphorique - Acide tartrique - Acide citrique - Acide lactique - Acide picrique - ARN - Arômes - Acides phtaliques - Acrylamides - Acides gras b B(Bore) 0(Oxygène) NN(diazote) E(Europium) A(Aluminium) N(Azote) NE(Néon) E(Erbium) - Bisphénol A - Butadiène - Botox & Biotox - Benzène - Baclofène - Barbituriques - Bicarbonate de sodium - Brome - Bore - Batteries - Baryum c d e Eau - Ethylène glycol - E. coli, amie et ennemie - Eau lourde f g h i j k Kevlar l m n o p q r s t u Urée - Uranium v y Yttrium z

Build an Atom - Atomic Structure, Atoms, Atomic Nuclei Topics Atoms Atomic Structure Isotope Symbols Atomic Nuclei Description Build an atom out of protons, neutrons, and electrons, and see how the element, charge, and mass change. Sample Learning Goals Use the number of protons, neutrons, and electrons to draw a model of the atom, identify the element, and determine the mass and charge.Predict how addition or subtraction of a proton, neutron, or electron will change the element, the charge, and the mass.Use the element name, mass, and charge to determine the number of protons, neutrons, and electrons.Define proton, neutron, electron, atom, and ion.Generate an isotopic symbol for an atom, given the number of protons, neutrons, and electrons.

Periodiska systemet Länkskafferiet - Skolämnen Här finns mer än 2000 filmer, ca 10 min långa, som förklarar matematiken för elever i förskoleklass, grundskolan och gymnasiet. Här finns även filmer inom naturvetenskapliga ämnen som biologi, kemi och fysik, samt inom humaniora, t.ex. ekonomi och historia. Taggar: algebra, aritmetik, astronomi, bankväsen, biologi, ekonomi, ekvationer, fysik, geometri, historia, kemi, matematik, matematikproblem, matte, matteproblem, sannolikhet CuSo4 + Fe Una reazione di scambio semplice Si tratta di una reazione chimica facilmente eseguibile, che richiede materiali di uso comune. Aiuta a capire e permette di visualizzare cosa accade in uno scambio tra due elementi nella formazione di un composto. Materiali occorrenti: alcuni chiodi di ferro (meglio se di dimensioni diverse); solfato di rame (tetraossosolfato di rame II) in polvere oppure in scaglie; becher; acqua; bilancia digitale. Ciascun gruppo di lavoro provvede a descrivere le caratteristiche dei chiodi di ferro, simili alle caratteristiche degli altri elementi chimici dell’area dei metalli. Il gruppo viene invitato a preparare 50 o 100 ml di soluzione acquosa di solfato di rame, ad esempio al 5% (5 grammi di soluto in 100 g di soluzione, oppure 2,5 gdi soluto in 50 g di soluzione. Se il solfato di rame è in scaglie, per facilitare il suo scioglimento, si può scaldare la soluzione. mentre nella soluzione incomincia a formarsi un precipitato (sul chiodo e sul fondo) costituito da rame. CuSO4 + Fe —> FeSO4 + Cu

Nylon, Rilsan et Kevlar : La grande aventure des polyamides Article rédigé par Jean-Claude Bernier et Rose Agnès Jacquesy (membres de la Société Chimique de France), édité par Nicolas Lévy (Responsable Editorial CultureSciencesChimie). Tables des Matières 1. Parmi les polymères, les polyamides occupent une place particulière que leur vaut leur popularité due à l’universalité de leurs fibres, qui se traduit par une production ayant avoisiné 6,8 millions de tonnes en 2011. Ils sont obtenus par polycondensation d’un acide aminé ou par ouverture d’un lactame avec 6, 11 ou 12 atomes de carbone (figure 1). Fig. 1 : Les polyamides Les principaux matériaux et fibres à base de polyamides (PA) sont le nylon, le Perlon®, le Rilsan® et le Kevlar®. 2. Le nylon a été découvert par Wallace Hume Carothers, un chimiste formé à Harvard et embauché en 1928 par la société DuPont de Nemours pour diriger un vaste programme de recherches sur la conception de matériaux polymères originaux. (-(C=O)-(CH2)6-(C=O)-NH-(CH2)6-NH-)n 3. Fig. 2 : Synthèse du Rilsan 4. 5. 6.

Energy Kids - Periodic Table File Scrub 1 ::::: EK ... periodic_table The periodic table is the most important reference a chemist has because it puts all the known elements into a meaningful pattern. Elements are arranged left to right and top to bottom in order of increasing atomic number. This order generally goes with increasing atomic mass. The different rows of elements are called periods. Learn more about the periodic table and each of the elements on the Los Alamos National Laboratory website.

Related: