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Unit 1, Section 4

Flame Test A test used in the laboratory to look for the presence of certain metal atoms. A simple of a compound is heated in a flame, and the resulting color is noted.
Valence Shell The outer most electron shell in an atom
Valence Electrons The electrons located in the outer most electron shell of an atom
Core Electrons All other electrons in an atom besides the valence electrons
Ion An atom (of a group of atoms) that has a positive or negative charge because it has lost or gained electrons
Cation An ion with a positive charge, usually formed by metal atoms
Anion An ion with a negative charge, usually these are formed from non-metal atoms
Ionic An ionic compound is a compound composed of positive and negative ions, formed when a metal and non-metal atoms combine.
Rule of Zero Charge In an ionic compound, the positive charge charges on the metal cations and the negative on the non-metal anions sum to 0
Electron Configuration A shorthand way to keep track of all the electrons. The number of electrons in each sub-shell is shown as a subscript
Created by: LanaB



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