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Owen- Chemistry
The Periodic Table
| Term | Definition |
|---|---|
| The Elements are put in order of _________ | increasing atomic number |
| Rows= _________ (same number of _________) | Periods; atomic electron shells |
| Columns= _________ (same number of _________) | Groups; Valence electrons |
| Periodic Law | states that when elements are arranged in order of increasing atomic number, there is a periodic repetition of their physical and chemical properties |
| Valence Electrons | Electrons in the outer energy level |
| Catergories: _________ | Metals, Nonmetals, Metalloids |
| Name for Group 1= _________ | Alkali Metals |
| Name for Group 2= _________ | Alkaline Earth Metals |
| Name for Group 3-12= _________ | Transition Metals |
| Name for Group 17= _________ | Halogens |
| Name for Group 18= _________ (don't react b/c _________) | Noble Gasses; Their outer energy level is full |
| Coulomb's Law - greater distance = _________ force; greater charge = _________ force | weaker; stronger |
| Ionization energy | the minimum amount of energy required to remove an electon from an atom in its gaseous state |
| Electronegativity | the measure of an atom's ability to attract and hold onto shared electrons in a chemical bond |
| Who was the first person to come up with a really good organizational system for trends and identifying similarities and differences between elements? | Dmitri Mendeleev |
| Henry Mosley came to the conclusion that the periodic table should really be based on atomic number (number of _________) instead of atomic mass | protons |
| Metals | make up approximately 80% of all the elements. Good conductors of heat and electricity, reflect light , are solid at room temp, are ductile and are malleable |
| ductile | pulled into wire |
| malleable | pounded into sheets |
| Non-metals | are gases, although there are some solids and Br is a liquid. There is no single set of properties, except they are the opposite of metals |
| Metalloids | have properties that are similar to metals and non-metals (conducts electricity and is brittle |
| Atomic Radius | down group- increases across period- decreases |
| Ionization Energy | down group- decreases across period- increases |
| Electronegativity | down group- decreases across period- increases |
| Metallic Character | down group- increases across period- decreases |
| There are 3 trends within the Periodic Table that are important for you to know. These are: _________ | trends in atomic radius, electronegativity, and ionization energy |
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