AP Biology Chapter 2 Outline

The Chemical Context of Life I. Chemical Elements and Compounds A. Matter consists of chemical substance agents in pure form and combinations called compounds.         1. Matter is anything that takes up blank shell 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. in that location argon 92 naturally occurring elements. 3. A compound is a substance consisting of two or more elements wholee in a fixed ratio. a. A compound has characteristics beyond those of its feature elements.         B. Life requires about 25 chemical elements. 1. The 4 main(prenominal) elements cognize to be essential to life ar carbon, oxygen, hydrogen, and nitrogen.                           a. These four be up 96% of living matte r. 2. Trace elements are those undeniable by an organism in only arcminute quantities. a. urge on 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 authoritative 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 jammed together tightly to form an atomic essence at the center of the atom. b. The electrons form a cloud roughly the nucleus, miserable at nearly the speed of light.                           c. Each electron has adept unit of negative charge.                           d. Each proton has one unit of convinced(p) charge.          ... Sorry about the t;Tab/> throughout 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 fix t;Tab/> with . If you want to get a full essay, order it on our website: OrderCustom Paper.com

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