gain electrons ▪ ▪ ionic compounds= compounds composed of cations and anions ▪ ionic compounds are electrically neutral ▪ anions and cations attract one another by means of electrostatic force ▪ ionic bonds= electrostatic forces that hold ions together in ionic compounds ▪ chemical formula=shows the kinds and numbers of atoms in the smallest representative unit of a substance. (ex: NaCl) ▪ formula unit= lowest whole number ratio of ions in an ionic compound. (In sodium chloride
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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 molecular
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TextBooks Sr No T-1 T-2 Title Engineering Chemistry Chemistry Reference Books Sr No R-1 Other Reading Sr No OR-1 OR-2 OR-3 OR-4 OR-5 OR-6 OR-7 Journals articles as Compulsary reading (specific articles‚ complete reference) http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)1097-4601 ‚ http://www.springer.com/chemistry/electrochemistry/journal/10800 ‚ http://www.sciencedirect.com/science/journal/13882481 ‚ http://www.springerlink.com/content/100224/ ‚ http://www.sciencedirect.com/science/journal/00108545
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products is an insoluble ionic compound or otherwise known as a precipitate; or a non-electrolyte; or a gas. In a single replacement reaction there is typically a metal and an ionic compound consisting of a metal cation and a non-meatl anion. Singel replacement ractions occur when the reacting element is more active‚ whihch means it is more likely to lose electrons than the product element. There was two parts to this experiment‚ in Part A we mixed various aqueous solutions of ionic compounds and observed
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valence electrons do atoms of each element have? a. nitrogen d. barium b. lithium e. bromine c. phosphorus f. carbon 37. Name each ion in Problem 36. Identify each as an anion or a cation. 7.2 Ionic Bonds and Ionic Compounds 38. Define an ionic bond. 39. Explain why ionic compounds are electrically 29. Write electron dot structures for each of the fol- lowing elements: a. Cl b. S c. Al d. Li neutral. *40. 30. Describe two ways that an ion forms from an atom
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negative anions. IONS Are charges particles. EXMAPLES Atomic Notation and Bohr Diagrams Lewis Dot Diagram Examples Lewis Dot Diagrams of an Negative ION (NON-METAL) Negative ions have 8 valence electrons! Lewis Dot Diagram of an Ionic Compound Lewis Dot Diagrams of an Positive ION (METAL) Positive Ions have no valence electrons! The Octet Rule REMEMBER! All elements want to be like the noble gases. All elements want full electron shells. All elements want 8 valence
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HKDSE Chemistry – A Modern View 1 (SAMPLE) Suggested Answers (Coursebook) |Chapter 1 The fundamentals of chemistry | |Class Practice |1 | |Chapter Exercises |3 | |Chapter 2 The atmosphere
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Biology Notes 1.02 Sometimes a practice or belief claims to be science but does not follow the scientific method or cannot be proven reliable through experimentation. These practices are examples of pseudoscience‚ which literally means "fake science." Charms‚ astrology = stars‚ and phrenology= reading the bump on skull 1.03 * In the mid 1600s in the Netherlands‚ the scientist Antonie van Leeuwenhoek developed the first known microscope using a single magnifying lens. He was the first person
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Lab Techniques & Measurements Pre Lab Questions: (4pts) 1. What will you learn after completing the lab? -The experiment will introduce different level of precision and measuring to the appropriate decimal place and will be familiar with measurements and weight. 2. Write the symbols and equation used to make a dilute solution from concentrated or stock solution. - The concentration of substance is described as molarity and this can be expressed as – Molarity
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students define the following terms: compound‚ metal‚ non-metals‚ ionic compound‚ covalent compound‚ ion‚ cation‚ anion‚ polyatomic ion‚ oxidation no. ‚ chemical formula‚ binary compounds‚ ternary compounds. 2. Ask the importance of giving chemical formulas to compounds. 3. Classify compounds as ionic or covalent. If ionic‚ identify whether binary or ternary. 4. Specify the rules in writing chemical formulas of binary ionic compounds using the Stock and classical method. 5. Specify the rules
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