Compounding in English and Vietnamese: A Contrastive Analysis Nguyen Ngoc Thao HCMC University of Education Introduction According to Wikipedia‚ a compound is a lexeme (less precisely‚ a word) that consists of more than one stem. Compounding is the word formation that creates compound lexemes (the other word-formation process being derivation). It refers to the faculty and device of language to form new words by combining or putting together old words. In other words
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Lab: Ionic and Covalent Bonds Objectives • Understand the differences between ionic and covalent bonds. • Connect ionic and covalent bonds with physical properties of matter. Introduction Sugar and salt look so similar that most people cannot tell them apart without tasting them. Chemically‚ white refined table sugar‚ sucrose‚ and salt are very different. An ionic bond between a positive sodium ion and a negative chloride ion creates a molecule of sodiumchloride (NaCl). Covalent bonds between
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PREPOSITIONS WHAT ARE PREPOSITIONS? Prepositions are words that demonstrate association between a noun or pronoun and another word‚ that is‚ to show how they are joined with some other word in a sentence. Examples: 1. The book is on the bed. 2. The book is under the bed. The various prepositions‚ on and under‚ used before the noun bed show the different positions of the book with regard to the bed. It shows the relation between the book and the bed. This is the function of Preposition
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and Its Compounds Carbon: Introduction Atomic Number: 6 Electronic Configuration: 2‚ 4. Valence electrons: 4 Property: Non-metal Abundance:- Carbon is the 4th most abundant substance in universe and 15th most abundant substance in the earth’s crust. Compounds having carbon atoms among the components are known as carbon compounds. Previously‚ carbon compounds could only be obtained from a living source; hence they are also known as organic compounds. Bonding In Carbon:- The Covalent Bond Bond
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4 Carbon and its Compounds IMPORTANT NOTES 9. Unsaturated organic compounds : Organic compounds in which a double or a triple bond exists between two carbon atoms in a carbon chain‚ are called unsaturated organic compounds. 10. Hydrocarbons : Organic compounds which contain only carbon and hydrogen atoms are called hydrocarbons. 11. Straight chain hydrocarbons : Hydrocarbons‚ in which all the carbon atoms are linked to one another in a straight chain by a single covalent bond are called straight
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IONIC COMPOUNDS In chemistry‚ an ionic compound is a chemical compound in which ions are held together in a lattice structure by ionic bonds. Usually‚ the positively charged portion consists of metal cations and the negatively charged portion is an anion or polyatomic ion. Ions in ionic compounds are held together by the electrostatic forcesbetween oppositely charged bodies. Ionic compounds have high melting and boiling points‚ and they are hard and very brittle. Ions can be single atoms‚ as the sodium and chlorine in
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The compound is the substance that can be two or more elements that can be changed. Water is a compound. It contains both Hydrogen and oxygen that can stand alone by itself. The mixture is when two different substances that are blended together. The air is a mixture of these elements carbon dioxide‚ nitrogen‚ and other stuff. Most mixtures are known to be naturally. The main difference between the compound and the mixture is how they are combined. In the pure substance‚ the only way to know if
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Elements and compounds are a result of the actions of the valence electrons. There are three types of bonds that I have learned about in the bonding comparison lab. These bonds include ionic‚ polar covalent‚ and non-polar covalent. Each of these bonds and the element compounds connected to them has individual solubility‚ conductivity‚ melting point‚ and volatility levels. The three element compounds that will follow are sodium chloride‚ sucrose‚ and p-dichlorobenzene. Sodium chloride is an ionic
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COMPLEXOMETRIC TITRATION LIGANDS: Metal ion ( analyte ; cation) Metal ion indicators Chilon Complexing agent pM indicators ( Chelating agent L igand/Sequestering agent) Chelate Complex ion Metal co -ordination compound /Metal complex/Chelate compound Ligands or complexing or chelating agents are electron donating entity‚ which has the ability to bind to the metal ion and produce a complex ion. The molecules or ions which displace the solvent molecules are
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and Its Compounds Carbon: Introduction Atomic Number: 6 Electronic Configuration: 2‚ 4 Valence electrons: 4 Property: Non-metal Abundance: Carbon is the 4th most abundant substance in universe and 15th most abundant substance in the earth’s crust. Compounds having carbon atoms among the components are known as carbon compounds. Previously‚ carbon compounds could only be obtained from a living source; hence they are also known as organic compounds. Bonding In Carbon: The Covalent Bond Bond
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