GCSE CHEMISTRY High Demand Questions THE PERIODIC TABLE QUESTIONSHEET 1 The boxes represent particles of different gases. One box shows the particles of elements in group 0 (group 8). A (a) (i) B C D What name is given to group 0 (8) elements? (ii) Name two elements from group 0. ......................................................................................................................................................................... [2] (b) (i) Which box
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metal reacts with phosphorus to produce calcium phosphide. i. The combustion of decane forms water and carbon dioxide. j. A solution of hydrochloric acid reacts with solid calcium bicarbonate to produce water‚ carbon dioxide‚ and calcium chloride. (Note: Carbonic acid decomposes to form the water and carbon dioxide) k. A solution
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Its ability to burn was put to use in various ways down the ages‚ starting with phosphorus tapers and phosphorus matches.” In chemistry‚ striking a match starts a chemical reaction. In class‚ we studied different types of chemical reactions but in lighting a match‚ combustion reaction would be the appropriate factor in describing this reaction. A combustion reaction as described
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water molecules can incorporate themselves into the ionic crystal structure. Water‚ after all‚ has an oxygen atom with two lone pairs capable of behaving as a Lewis base; it bonds easily to metal ions as evidenced by complex ions in transition metal chemistry. The metal ions and the water molecules are bonded by dative coordinate bonds from the oxygen atom of the water. Therefore‚ Water of crystallization is water that is stoichiometrically bound into a crystal. Crystal salts containing water of crystallization
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Chemistry: Atom structure theories Scientific research is a multistage and complicated process which requires many creative minds to contribute into its creation in order to be efficacious and present solid results. I’ve been given an information sheet apprising ideas of four scientists whose work was very significant in creating the theory about atom structure we recognise nowadays. Guiding Questions: 1 What significant contribution did each of the following people make to present ideas about the
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Topic 5 – Bonding and Structure Revision Notes 1) Introduction • Atoms form bonds to get a full outer shell of electrons • There are three types of bonding: ionic‚ covalent and metallic • The structures produced by forming bonds are either giant or simple • The possible combinations of structure and bonding are giant ionic‚ simple covalent‚ giant covalent and giant metallic • Simple covalent is sometimes called simple molecular • Giant covalent is sometimes called giant
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3090 3090▌ SHORT REVIEW Reaction of Diazo Compounds with Organoboron Compounds short review Huan Li‚ Yan Zhang‚ Jianbo Wang* Reaction of Diazo Compounds with Organoboron Compounds Abstract: The transition-metal-free reactions of diazo compounds with organoboron compounds are reviewed. This type of reaction provides an alternative approach for the formation of C–C‚ C–B‚ and C–Si bonds. Moreover‚ by using tosylhydrazones as diazo compound precursors and boronic acids/esters as the
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Writing an Organic Chemistry Lab Report Components of a Laboratory Notebook The following components should be contained for each experiment‚ along with any additional material required by your instructor. • Title and date • Introduction (purpose‚ reaction) • Physical data (including calculations) • Procedure outline • Data and observations • Discussion of results (conclusions) Prelab Title and Date Give the title of the experiment and the date on which
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TSL 570 LITERATURE AND MEDIA WRITE-UP DEATH NOTE‚ THE LAST NAME PREPARED FOR: MDM ADZURA ELIER PREPARED BY: NURHANIM AFIQAH BINTI MUD A (2012404338) GROUP: ED2203B DATE OF SUBMISSION: 18TH DISEMBER 2013 ANALYSIS Death Note‚ The Last Name is about a high school super-genius‚ Yagami Light who finds a book that can kill people. He decides to create a perfect world where there is no crime‚ and sets out to kill every criminal on the planet. However‚ he is challenged by Ryuzaki‚ a brilliant
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Unit 1 Notes Chapter 3 Matter Observation v. Inference • Observation: • Quantitative or qualitative • ___________________________________________________ • Inferences: • Something that you know from ____________________________ • Ex. “made of wood”‚ “wax” Physical v. Chemical Properties • Physical Properties: • Can be observed without changing the chemical makeup of a substance • Examples: • Chemical Properties: • Describes a chemical change & the kinds of chemical reactions that
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