Balancing chemical equations 1. Complete the following sentences‚ using the words or groups of words in the box below. You may use some words more than once. |• as small as possible |• decrease |• molecules |• quantities | |• balance |• different |• nature |• rearranging | |• bonds |• equal
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path of what is socially expected from her‚ and in such creates her own desolation. She opts to satisfy herself over what she is accountable for. In the end‚ there could be no happy ending for her because of this. Chopin assimilates many motifs and symbols including minor characters to contrast Edna’s complications with her own identity and place
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Give the elements English and elemental symbol‚ if the elemental symbol is different then would be expected in English‚ such as tungsten W‚ describe why it has that symbol ▪ The element name is osmium and its elemental symbol is Os. Its atomic mass is 190.23 2. What is the elements atomic number‚ what class of elements does it fall into ▪ The atomic number for osmium is 76. Osmium falls into the transition metal group. 3. Are there any common isotopes of this element?
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Scandium is a chemical element with symbol Sc and atomic number 21. A silvery-white metallic transition metal‚ it has historically been sometimes classified as a rare earth element‚ together with yttrium and the lanthanoids. It was discovered in 1879 by spectral analysis of the minerals euxenite and gadolinite from Scandinavia. Scandium is present in most of the deposits of rare earth and uranium compounds‚ but it is extracted from these ores in only a few mines worldwide. Because of the low availability
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CHEMICAL BONDS Chemical Bonds I. Introduction Chemical compounds are formed by the joining of two or more atoms. A stable compound occurs when the total energy of the combination has lower energy than the separated atoms. The bound state implies a net attractive force between the atoms called a chemical bond. The two extreme cases of chemical bonds are the covalent bonds and ionic bonds. Covalent bonds are bonds in which one or more pairs of electrons are shared by two atoms. Covalent bonds
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Chemical Reactions and Equations Chemical Reaction: The transformation of chemical substance into another chemical substance is known as Chemical Reaction. For example: rusting of iron‚ setting of milk into curd‚ digestion of food‚ respiration‚ etc. In chemical reaction new substance is formed which is completely different in properties from the original substance‚ so in a chemical reaction chemical change takes place. Following are the signs of chemical reaction: (a) Change of state of substance
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Chemical Bonding Chemical compounds are formed by the joining of two or more atoms. A stable compound occurs when the total energy of the combination has lower energy than the separated atoms. The bound state implies a net attractive force between the atoms ... a chemical bond. The two extreme cases of chemical bonds are: Covalent Bonds Covalent chemical bonds involve the sharing of a pair of valence electrons by two atoms‚ in contrast to the transfer of electrons in ionic bonds. Such bonds lead
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Throughout Shakespeare’s Macbeth‚ numerous symbols are used. Many of these depict characters’ actions and appearances‚ emotions‚ and events that have happened previously in the play. Although there are many symbols used all through the play‚ there are three important groups of symbols that are used most regularly. These are blood‚ sleep and animals‚ which all have different representations. <br> <br>Blood is an important symbol that is used continuously in the play. In the beginning of the play‚
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Element: Simplest form of matter to have unique chemical properties. Atom: The smallest particles with unique chemical identities. Nucleus: Center of an atom (composed of protons and neutrons). Proton: Have a single positive charge (+1). Neutron: Have no charge. Electron: Tiny particles with a single negative charge and very low mass (-1)/determines chemical bonding properties of an atom. Atomic Number: Number of protons in the nucleus. Atomic Mass: Approximate number of protons and neutrons
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Question Mark 1.Expand the following compound nouns:1.Weather report.2.Hairpin bend.3.Rubber pad.4.Fast food Mr.JA/ENG 2 2.Write a paragraph comparing and contrasting mobile phone and landline. Mr.JA/ENG 16 Cause & Effect Expression 1.1. A nail has pierced the Tyre. The essential commodities have become costlier. 2. Safety precautions were not observed. There were many accidents in the factory. 3. Many prefer private vehicles for commutations. It is over crowding in public transport. 4
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