1 / 5

Chemistry —The study of the properties of matter and how matter changes.

Chemistry —The study of the properties of matter and how matter changes. Element —a substance that cannot be broken down into any other substances by chemical or physical means. Example: Carbon--C All the matter around you is composed of one element or a combination of two or more elements.

cassandra-gilbert
Download Presentation

Chemistry —The study of the properties of matter and how matter changes.

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. Chemistry—The study of the properties of matter and how matter changes. • Element—a substance that cannot be broken down into any other substances by chemical or physical means. • Example: Carbon--C • All the matter around you is composed of one element or a combination of two or more elements. • Atoms—Smallest part of an element. All atoms of an element have the same chemical properties of atoms of other elements. • Molecule—a combination of two or more atoms. Some molecules are made of atoms that are alike, as is oxygen gas (O2) that you breathe.

  2. Compounds and Mixtures • Compounds—A substance made of two or more elements chemically combined. They have a chemical formula. • Examples: Sugar, Salt • Mixtures—Substances that are mixed, but NOT chemically combined. They do not have formulas and can be separated by physical means. • Examples: Dixie Cheeseburger, Iron and Sand

  3. Heterogenous mixture—mixture you can see the different parts • Example—lasagna • Homogeneous mixture—mixture that looks the same throughout • Example-milk, Crest toothpaste

  4. Changes • Physical changes—A change that alters the form or appearance of a material, but it does not change the material into a new substance. • All phase changes are physical. • Examples: tearing paper, evaporating water. • Chemical changes—A change in matter that produces a new substance. • Example: Burning wood

  5. Signs of Chemical changes: • Signs of a chemical change: • A precipitate forms. (A solid that forms when two liquids are mixed.) • Color Change • Gas Production (You should see bubbles.) • Changes in temperature • Changes in Properties

More Related