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Kendall Lawson
Chapter 5 Vocabulary
Term | Definition |
---|---|
Periodic Table | An arrangement of elements into columns, based on set of properties that repeat from row to row |
Period | Each row in the table of elements. |
Group | Each column on the periodic table. |
Periodic Law | The pattern of repeating properties |
Atomic Mass Unit | An amu is defined as one twelfth the mass of carbon-12 atom |
Metals | are elements that are good conductors of electric current and heat |
Nonmetals | are elements that are poor conductors of heat and electric current |
Metalloids | are elements with properties that fall between those of metals and nonmetals |
Valence Electron | an electron that is in the highest occupied energy level of an atom |
Alkali metals | Elements in group 1A |
Alkaline Earth Metals | The elements in group 2A |
Halogens | The elements in Group 7A |
Noble Gases | The elements in group 8A |
Transition Metals | Are elements that form a bridge between the elements on the left and right sides of the table |