Knock Hardy KNOCKHARDY PUBLISHING produces notes and other resources for AS and A2 Level Chemistry. The module references are for the AQA and OCR examinations but the material applies equally well to other specifications. The pages are saved as PDF files and may be freely read and printed for personal use but they may not be revised or circulated in any other form without the consent of Knockhardy Publishing. JONATHAN HOPTON Selected Pre-2008 specifications Last amended 23/08/2017 Mod 1 Mod 2 Mod 3 Mod 4 Mod 5 Module numbers refer to the latest OCR specification. These, and other, animated gifs are to be found inside my Powerpoint presentations. Complete topics summarised on one sheet Single page help sheets © 2001, 2008, 2015 Knockhardy Publishing and Jonathan Hopton FORMATION OF SODIUM CHLORIDE GCSE Chemistry resources: www.knockhardy.org.uk/gcse.htm F321 F322 F323 F324 F325 Unit numbers refer to the OCR specification. NOTES FOR 2015 SPECIFICATIONS ARE NOW AVAILABLE - see below Mod 6
AQA – GCSE Additional Science GCSE Additional Science offers students a broad, coherent course of study that adds to their knowledge and understanding of the living, material and physical worlds. For Key Stage 4 (KS4) learners it is a good follow on from GCSE Science A or B. The three core Sciences of Biology, Chemistry and Physics are taught separately using Unit 2 modules from the individual subject GCSEs. This specification allows subject specialists to teach the appropriate units focussing on their area of expertise, or it can be taught by an integrated Science teacher. Teachers can choose between two routes: three separate exams in Biology, Chemistry and Physics together with a controlled assessment, ortwo combined exams plus the controlled assessment. It is suitable for students of all abilities and helps students to understand theoretical concepts alongside developing practical science skills. Specification Amended due to Changes to GCSEs.
Origin of the Periodic Table I know what the periodic table looks like, but where did it come from? Whose idea was it to arrange the elements this way? He set them out in order of atomic weight, and then grouped them into rows and columns based on their chemical and physical properties. 1869...that's way before the Schrödinger model, or even the Rutherford model. That's right. Based on the gaps in his table, Mendeleev even succeeded in predicting the existence and properties of several new elements. That's pretty impressive. His basic rule was this: the elements in any column, or group, of the table are similar to their column-mates. Click here if you'd like to read more about Mendeleev's methods and the chemistry of his time.
BUILDING BIG: Home Page Explore large structures and what it takes to build them with BUILDING BIG™, a five-part PBS television series and Web site from WGBH Boston. Here are the main features of the site: Bridges, Domes, Skyscrapers, Dams, and Tunnels. The Labs Try your hand at our interactive engineering labs. The Challenges Take on the challenges of building big. Wonders of the World Databank Explore our databank of big structures. Local Wonders Investigate big structures near you. Who Builds Big? About the Series Learn more about the shows, and see a chat with David Macaulay. Educators' Guide How to use the Web site, with hands-on activities. Shop Building Big DVDs and books from David Macaulay available at ShopPBS.org. Site Tour Learn more about the features in this site. Site Map The whole site at a glance. Web Credits Feedback Help
Doc Brown's (chemistry teacher) GCSE Science Biology Physics HOMEPAGE Revision Notes Quizzes e-learning website free to use online Practice Problems Here are some additional practice problems for this lesson. You can check the answers by clicking on the Answer link to the right. (Use atomic weights that are precise to the hundredths place.) (Modified from Exercise 8) - Gram-mole Practice Problems 1. 2. 3. 4. 5. 6. 7. 8. (Modified from Exercise 13) - Practice Calculating Formula Weights 1. 2. 4. 5. 6. 8. (Modified from Exercise 14) - Gram-mole Practice Problems 1. 2. 3. 4. 5. 6. 7. 8. (Modified from Exercise 17) - Practice Calculating Composition From Formula 2. 3. 5. 6. (Modified from Exercise 19) - Practice Determining Empirical Formulas 1. 2. 3. 4. 5. 6. 7. (Modified from Exercise 21) - Practice Determining Molecular Formulas 1. 2. 3. 4. Top of Page Back to Course Homepage E-mail instructor: Sue Eggling
WebElements Periodic Table of the Elements REACTIONS What is a chemical reaction? Examples of chemical changes, physical changes, and some gray areas. Chemical equations of chemical reactions.Balancing equations. Balancing ionic equations with polyatomic ions. Balancing combustion (burning) equations. A chemical reaction is material changing from a beginning mass to a resulting substance. A chemical equation is a way to describe what goes on in a chemical reaction, the actual change in a material. Back to the top of Reactions. Chemical reactions, also called chemical changes, are not limited to happening in a chemistry lab. A silver spoon tarnishes. Ag2S An iron bar rusts. 2 Fe2O3 Methane burns. An antacid (calcium hydroxide) neutralizes stomach acid (hydrochloric acid). CaCl2 + 2 H2O Glucose (simple sugar) ferments to ethyl alcohol and carbon dioxide. 2 C2H5OH (ethyl alcohol) + 2 CO2 Alcohol plus oxygen becomes vinegar and a molecule of water. Here are some examples of changes that are NOT chemical reactions. _ Ag+ (NO3)- + _ Ca2+ Cl-2 Easy.
Biology For Kids - KidsBiology.com Canoë - Techno-Sciences - Des vêtements intelligents pour détecter les maladies Des chercheurs Américains et en Chinois viennent de faire de sérieux progrès vers la production relativement simple et peu coûteuse de «tissus intelligents», des textiles électroniques capables de détecter les maladies, surveiller le rythme cardiaque ainsi que d'autres signes vitaux. Les résultats de cette recherche digne d’un roman de science-fiction publié dans le magazine scientifique ACS' Nano Letters de décembre. Dans cette étonnante étude, Nicholas A. Les fibres mises au point par les chercheurs sont en coton enduit d'électrolytes et de nanotubes de carbone (CNT). Dans les tests de laboratoire, les chercheurs ont montré que la nouvelle fibre intelligente peut allumer une simple diode électroluminescente lorsqu'elle est connectée à une batterie.
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