Chapter 5: The Periodic Table - Physical Science
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Created by:
NAZ_LAX_FLO on December 2, 2010
Subjects:
science, science test 8th grade
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11 terms
Terms | Definitions |
|---|---|
 Mendeleev | Arranged the elements into rows in order of increasing mass so that elements with similar properties were in the same column. |
| The Periodic Law | The pattern of repeating properties between an element's chemical properties in a certain group. |
| Atomic Mass | it is a value that depends on the distribution of an element's isotopes in nature and the masses of those isotopes. |
| Metals | These types of elements are good conductors of electric current and heat. |
| Transition Metals | These elements form a bridge between the elements on the left and right side of the periodic table. |
| Nonmetals | These elements are poor conductors of heat and electric current. They also have low boiling points. All of these elements in the periodic table are gases. |
| Metalloids | These elements have properties that fall between metals and nonmetals. There abilities to conduct electric current varies with temperature. |
| Valence Electron | This electron is an electron that is in the highest occupied energy level of an atom. |
| Alkali Metals | These metals are located in Group 1A and have a single valence electron and are extremely reactive. |
| Halogens | These elements are located in group 7A and each one of these elements have seven valence electrons. |
| Noble Gases | These elements are located in group 8A and each one of these elements have eight valence electrons. These elements are colorless and odorless and extremely unreactive. |
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