[CHY 102] - Final Exam Guide - Ultimate 83 pages long Study Guide!
29 Nov 2016
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Periods horizontal rows in a periodic table in which are found elements with differing properties. Families-vertical groupings in which are found elements with similar properties. As you move from left to right metals transition to non-metals. Group 0 least reactive of all the elements. Named noble gases because they are gases at room temp and pressure. Atomic # one greater than the noble gases. React with h to form compounds which dissolve in water to form acidic solution. Combine with metals to form compounds called salts. It has properties unlike those of all the others. Isoelectronic- elements whose electron configurations are the same. Valence electrons-the electrons in the outer energy levels are the ones which usually participate in chemical reactions. It is the change in energy that occurs when an atom gains an electron. When a negative ion is formed, lots of energy is released (an exothermic reaction). So much so that scientists give it a negative value.
