Chemistry revision Atoms elements and compounds Atom-the smallest part of an element that can still be recognized as an element Element-a substance made up of only one type of atom. An element cannot be broken down chemically into any simpler substance Nucleus-middle of the atom‚ which contains protons and neutrons Electron-tiny particle‚ which surrounds the nucleus with a negative charge Compound-when two elements react and combine together which contain more than one element. There
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Name: Kamaal Thomas |Date: January 4‚ 2011 | |Graded Assignment Lab Report Answer the questions below. When you have finished‚ submit this assignment to your teacher by the due date for full credit. (8 points) |Score | | | 1. For Part 2: Single-Displacement Reactions: For each of the four single-displacement reactions‚ describe what happened in each well. If a chemical reaction occurred‚ write a balanced equation for it. Then using the A‚ B symbols‚
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Lab Report Name: _____ Date: ______ Ionic Reactions List all of the cations used: Cobalt‚ Copper‚ Iron‚ Barium‚ Nickel List all of the anions used: Phosphate‚ Iodide‚ Sulfate‚ Chloride‚ Bicarbonate‚ Carbonate‚ Hydroxide Compare your results with the solubility rules and/or solubility table in your chemistry text. QUESTIONS: A - Do your results agree with your expectations
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Unit C2‚ C2.2.3 Covalent structures 1. This drill contains an electric motor. The diagram below shows the main parts of an electric motor. The carbon contacts are made of graphite. Springs push the contacts against the copper ring. The contacts conduct electricity to the copper ring. The copper ring rotates rapidly but does not stick or become worn because the graphite is soft and slippery. Graphite has properties which are ideal for making the contacts in an electric motor. Explain
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following: electrolyte‚ nonelectrolyte Electrolyte: A substance that dissolves in water to form solutions that conduct electricity. Nonelectrolyte: A compound that doesn’t dissociate into ions when dissolved in water. 2.) Using examples in the last link‚ draw beakers showing atomic scale representations of aqueous solutions of the following compounds. Classify each as an electrolyte or nonelectrolyte. * Ba(OH)2 (aq) * NH3 (aq) * C3H7OH (aq) * NaHCO3 (aq) 3.) Why would it
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Ionic bonding is known as a type of chemical bond where the valence electrons are lost from one atom and gained by another. This exchange results in a more from one atom and gained by another. When an atom gains or loses electrons while being bonded with another atom an ion is formed. This bond causes an atom to become either a positive or negative ion. Electrons have a negative charge‚ meaning that if an atom loses an electron‚ the amount of protons are greater than electrons. This makes the atom
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weight for: KHSO3 2. How many of each type of atom are present in 0.667 mol of [CrCl2(NH3)4]Cl 3. Calculate the molecular formula for the compound that contains 40.92% C‚ 4.58% H‚ 54.50% O‚ and has a molecular mass of 176 u. 4. When 1.019 g of potassium reacts with O2‚ it forms 1.860 g of a rather strange compound. Find the empirical formula of this compound‚ and explain why it is strange. 5. How many grams of BaSO4 (s) are formed when an excess of BaCl2 (aq) is added to 635 mL of 0.314 M Na2SO4
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Organic compound From Wikipedia‚ the free encyclopedia Jump to: navigation‚ search Methane is one of the simplest organic compoundsAn organic compound is any member of a large class of chemical compounds whose molecules contain carbon. For historical reasons discussed below‚ a few types of carbon-containing compounds such as carbonates‚ simple oxides of carbon and cyanides‚ as well as the allotropes of carbon such as diamond and graphite‚ are considered inorganic. The distinction between "organic"
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Topic : Compound Adjective Content Part 1: Introduction( page 3) - Introduction the compound adjective - Reason for choosing compound adjective‚ the important of the compound adjective Part 2: Literature review - Definition of compound adjective(page 4 ) - Function of compound adjective( page 4) - Classification of compound adjective( page 4‚5) Part 3: Application ( In teaching and learning English ) - Problem( page 6) - Suggestion for learning and
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ASPIRANT FOR THE POSITION OF COMPOUND PREFECT Mr. Chairman‚ Honorable Headmaster‚ Members of Staff‚ Co-aspirant‚ Out-going Prefect‚ Fellow Student‚ Ladies and Gentlemen. Good day. I am very grateful for being given the chance to read my manifesto to you‚ as an aspirant for the position of compound prefect. I am Afful Christopher‚ a second year art student of this great institution. I am before you today‚ to solicit to your vote for the enviable position of a compound prefect for the 2013/2014 academic
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