422-003+chapter+summaries

Chapter 1 1.1 Chemistry deals with extraordinary questions that sometimes cannot even be answered. There are a lot of "What If?" questions. Instruments help Chemists to make great advances and with applied research; like helping to fight cancer, and drive cars by using atoms and molecules for experimental material. The six branches of Chemistry are: organic, inorganic, physical, analytical, biochemistry and theoretical. Chemists study chemicals so that they can help advance our way of living; technology is a great example of how Chemists continue to be successful. Chemists make inventions and our ability to drive cars possible. 2.2 Everything has matter, and all matter has mass. Matter is made up of atoms and molecules. An element cannot be broken down and a compound can be broken down. There are extensive and intensive properties, which control the physical characteristics of a material. An example of a physical change is ice melting to water (solids to liquids). Changes may occur to a material that can change it chemically, and be permanently different, or it can change physically, which is a temporary diversion from its original state. ~rebecca stacey

summary 1.3 We start off talking about the periodic table. How each box contains the symbol for its element. It goes on to explain how the periodic table is is divided into sections: the vertical columns are called groups or families, while the horizontal rows are named periods. The two main sections in the table are metals and nonmetals. A metal is able to conduct heat and electricity well, while nonmetals can not. Also most nonmetals are gases at room temperature. Another cluster of elements that are neither metals or nonmetals are considered metalloids. Metalloids are elements that have characteristics of both metals and nonmetals. The section raps up talking about noble gases.