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Unit 1, Section 4
| Question | Answer |
|---|---|
| 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 |