1 / 8

Compounds

Compounds . Pgs. 58 - 61. What is a Compound?. Elements are not always found in their natural state. They undergo chemical changes fairly easily and are found combined with other elements as compounds.

thanh
Download Presentation

Compounds

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Compounds Pgs. 58 - 61

  2. What is a Compound? • Elements are not always found in their natural state. • They undergo chemical changes fairly easily and are found combined with other elements as compounds. • A compound is a pure substance composed of two or more elements that are chemically combined. • Ex. Salt, water, sugar, carbon dioxide, baking soda

  3. Elements Combine in a Definite Ratio • Compounds are not random combinations of elements. • They form in a specific ratio according to their masses. • Water has a ratio of 1 gram of hydrogen to 8 grams of oxygen. • All water has this same mass ratio.

  4. Every Compound has a Unique Set of Properties • Each compound has its own physical properties. • Compounds can be identified by their chemical properties as well. • Compounds have different properties from the elements that formed them. • Ex. Sodium + Chlorine = Salt • Sodium is a metal, chlorine is a poisonous gas, and salt is safe white nonmetal solid.

  5. Compounds Can Be Broken Down • Some compounds can be broken down into elements through chemical changes. • Ex. Mercury oxide breaks down into mercury and oxygen gas. • Others can undergo chemical changes to form simpler compounds. • Ex. Carbonic acid can break down into carbon dioxide and water

  6. Compounds Cannot Be Broken Down Physically • The only way to break down a compound is through a chemical change. • Filtering, grinding, and breaking are all physical changes. • The compound will keep its identity through those processes.

  7. Compounds in Nature • Proteins are compounds used by all living things. • Proteins have nitrogen that both plants and animals can use once the protein is broken down into simpler substances. • Carbon dioxide is another important compound for life. • Animals exhale it and plants take it in to make food and other compounds.

  8. Compounds in Industry • Nitrogen can be combined with hydrogen to form ammonia. • Ammonia is used in fertilizers for plants. • Other compounds can be things like medicines, food preservatives or synthetic fibers. • Compounds found in nature are not usually the raw material needed by industry. • Ex. Aluminum is found as aluminum oxide. • Aluminum is used to make cans, airplanes, and building materials.

More Related