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Chem: Lesson 4

The Periodic Table

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.
Created by: Sydbriggs



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