CHEM-UA 120 Lecture Notes - Formal Charge, Relative Atomic Mass, Bromine
19 Sep 2013
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Document Summary
Closeness of particles- particles interacting but molecules has mobility. Matter- anything that occupies space and has mass. Mass- the amount of matter in a substance. Substance (pure)- can be an element or a compound. Element- on of the 108 building blocks of all matter elements can not be broken down into smaller units by simple chemical means (na, h, o) Compound- a form of matter in which 2 or more elements are held together in a fixed ratio by chemical bonds. Atmospheric pressure- pressure exerted on the earth"s surface due to the gases of the air colliding with the earth. Melting point- temperature when a solid changes to a liquid. Boiling point- the temperature that a liquid will boil at normal atmospheric pressure. Boiling- the process where the temperature has risen enough so that all molecules can overcome the attractive forms that hold together the liquid molecules, to form the gaseous state.
