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Details Title: Midterm Study Guide Description: Chemistry + Physics (8th Grade) √ Total Flash Cards: 10 Created: 03/09/2005 15:31:28	To study from this set of flash cards, or to create your own your own study flash cards, register HERE. If you are already a registered user, CLICK HERE.
Cards Term characteristics are color, hardness, flammability, smooth, etc. Definition Properties of Matter Term 2 or more substances NOT chemically combined Definition Mixtures Term can not be broken down to an element Definition Substance Term a substance that cannot be broken down into another substance by physical or chemical means Definition Elements Term a substance made of two or more elements chemically combined Definition Elements Term does not create a new material or change appearence Definition Physical Change Term produces a new substance Definition Chemical Change Term (A) atom is a nucleus surrounded by negative electrons (B) nuclei contains protons and neutrons (C) protons are positive (D) neutrons have no charge (E) electrons - negative charge (F) # of protons = # of electrons = atomic # (G) # of neutrons is ca Definition Atomic Structure Term number of electrons on the outer shell (8 of these=stable) Definition Valence Electrons Term metals to the left of the zigzag line- each group has the same # of electrons (elements on the left are very reactive, those on the right side are least reactive; 8 valence electrons=stable) Definition Periodic Table Organization