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Chemistry Terms: Chemical Symbols Chemical Formulas Subscripts Yield Arrow Used to represent elements Used to represent compounds Numbers that sit after and below the symbol. Represent number of atoms of that particular element. Numbers used to show how many molecules and/or compounds there are in a substance Are used to show reactions All substances needed for the reaction to take place All substances are on the left hand side Separated by a + sign Substances made from reaction Indicates reaction only takes place 1 way Separates the products from the reactions Elements and Compounds C H O N P S Cl Na Fe O2 CO2 ATP NaCl H2O C6H12O6 Carbon Hydrogen Oxygen Nitrogen Phosphorous Sulfur Chlorine Sodium Iron Oxygen Molecule Carbon Dioxide Adenosine Triphosphate Sodium Chloride- table salt Water Glucose Coefficients Chemical Equations Reactants Products Macromolecule Macromolecule Carbohydrate Lipid Protein Nucleic Acid Atom Element Compound Organic compounds that make up all living things Energy-rich organic compound made of the elements carbon, hydrogen, and oxygen Energy rich organic compound such as fat Large organic molecule made of carbon hydrogen nitrogen and sulfur Organic molecule made of carbon oxygen hydrogen nitrogen and phosphorus Building block of matter, most basic form of matterone atom of element Most basic [art of matter- cannot be simplified further 2 or more elements chemically combined Content: Chemical Symbols 1. First letter always capitalized 2. If two letters in symbol second one is always lowercased Chemical Formulas 1. Subscripts 2. Coefficients Chemical Equations 1. Reactants 2. Products 3. Yield Arrow Element and compound symbols Macromolecules Concepts/Skills: Know how to write chemical symbols Know how to write chemical formulas Know how to read and write chemical equations Know the basic elements and compounds Know macromolecules Diagrams Sample questions: 1. What are the rules for writing chemical formulas 2. What are the two parts of a chemical equation 2FeH3 3. How many elements are in this compounds 4. How many atoms of H are there 5. What is the 2 called in this equation 6. Why must the second letter of an element’s symbol be lowercase? 7. What does the arrow mean in the chemical equation 8. What elements are in a lipid? 9. What is the function of nucleic acid? 10. What are 3 examples of lipids? 11. Where are proteins found