Understanding Elements
Students examine the periodic table and the properties of elements. They learn the basic definition of an element and the 18 elements that compose most of the matter in the universe. The periodic table is described as one method of organization for the elements. The concepts of physical and chemical properties are also reviewed.
Students examine elements and the periodic tableCopyright Wikimedia Commons https://commons.wikimedia.org/wiki/File:Model_showing_Periodic_Elements_of_Chemistry_Wellcome_L0002952.jpg
Engineers use the properties of matter to decide what materials to use when creating and building things. For example, metals have certain properties that allow them to bend or not bend, to expand and contract, and to hold certain amounts of weight. Engineers also use the chemical properties of different elements to develop mixtures and substances for new medicines and products.
- Distinguish between physical and chemical properties.
- Describe the arrangement of elements in the periodic table of elements.
- Describe how engineers use knowledge of the physical and chemical properties of elements when choosing materials for products.