134x Filetype PDF File size 0.07 MB Source: www.warrenhills.org
Periodic Table Notes Periodic Table: An organized list of all How does an atom, molecule, element, and known elements. Element Key tells you how compound relate to each other? to read the Periodic Table. Atoms (singular) make up molecules (plural) Elements are arranged in groups (families) & Elements(singular) make up compounds periods. (plural) G R Atoms are the basic unit of an element O U Molecules are the basic unit of a compound Period Group is a column on the periodic table. Period is a row on the periodic table. Elements are also arranged into metals, Valence Electrons: Electrons found on the nonmetals, & metalloids. outermost energy level. These electrons are Metals: Shiny, solid, durable, hard, conducts involved in bonding. heat & electricity. Nonmetal: Opposite of a metal-soft, brittle EDD-Electron Dot Diagrams: Shows the solids, poor conductors of heat & electricity. number of valence electrons for an element. Metalloids: In-between a metal & a nonmetal. Has some properties of a metal and some of a nonmetal. Periodic Table Notes How to draw an EDD? 1. Write the chemical symbol. 2. Determine how many valence electrons are associated with the element. 3. Draw a dot for each valence electron around the chemical symbol. Remember to think about a clock:12:00, 3:00, 6:00, 9:00. 4. To determine how many valence electrons look at the group number. If the number is a 2 digit #, ignore the 1. The maximum # of valence electrons is 8 for any given element. Helium is the only exception to the rule.
no reviews yet
Please Login to review.