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Chem: Lesson 4
The Periodic Table
Question | Answer |
---|---|
Rows | Side to side (Period) |
Column | Up and Down (Groups, Families) |
Metals | Generally Shiny, solid at room temperature except Mercury which is a liquid, good conductors of heat and electricity, malleable, ductile. |
Group 1 | Alkali Metal. Softer than most other metals, the most reactive, only found as compounds with other elements. |
Group 2 | Alkaline Earth Metals. Chemically reactive and are not found as often. |
Groups 3-12 | Transitional Metals. They are the most familiar because they occur in nature. |
Non -Metals | Often gases. Poor conductors of heat and electricity. Often react with metals and pick up electrons. Most reactive are Halogens |
Nobel Gases | Group 18, the most stable, react and combine easily with other substances. |
Metalloids | Have properties of both metals and nonmetals |
Stability | Stable elements are unreactive |
Order of Stability | -full outer shell -full sublevel -half-full sublevel -one electron in the outer shell or seven electrons in the outer shell Note: Atoms react to become more stable than before. |
Lewis dot diagram | Begin by writing down the element symbol Write the electron configuration Each side of the element represents an outer orbital. fill in the dots according to the different orbitals. |