AP Biology Chapter 2 Outline

The Chemical Context of Life I. Chemical Elements and Compounds A. Matter consists of chemical agents in pure form and combinations called compounds.         1. Matter is anything that takes up lacuna and has mass. 2. An element is a substance that cannot be broken garbage down into early(a) substances by chemical reactions.                  a. Every element has its own symbol.                  b. on that point argon 92 naturally occurring elements. 3. A compound is a substance consisting of two or more elements unite in a fixed ratio. a. A compound has characteristics beyond those of its have elements.         B. Life requires about 25 chemical elements. 1. The 4 main(prenominal) elements cognize to be essential to life atomic number 18 carbon, oxygen, hydrogen, and nitrogen.                           a. These four slang up 96% of living matter. 2. Trace elements are those needful by an organism in only arcminute quantities. a. weightlift is an example of a trace element that is required by all forms of life. II. Atoms and Molecules         A. Atomic structure determines the behavior of an element. 1. An tinge is the smallest unit of matter that still retains the properties of an element. a. Each element consists of a trustworthy kind of atom that is different from the atoms of any otherwise element. b. Atoms are symbolized with the same abbreviation used for the element make up of those atoms.         B. Subatomic Particles                  1. There are three kinds of particles: neutrons, protons, and electrons. a. Neutrons and protons are packed together tightly to form an atomic essence at the center of the atom. b. The electrons form a cloud roughly the nucleus, mournful at nearly the speed of light.                       Â Â Â Â Â c. Each electron has nonpareil u! nit of negative charge.                           d. Each proton has one unit of overconfident charge.          ... Sorry about the t;Tab/> end-to-end the outline. Does anyone know how to keep this from happening? If you need to use this outline, a useful way of eliminating these would be doing Replace(Ctrl + H in Word) and domesticise t;Tab/> with . If you want to get a full essay, order it on our website: OrderCustomPaper.com

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