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Noah Gaskins
Chapter 5 Vocab.
Term | Definition |
---|---|
Periodic Table | An arrangement of elements in columns, based on a set of properties that repeat from row to row. |
Period | Each row in the table of elements is a period. |
Group | A column of elements in a periodic table |
Periodic Law | The pattern of repeating properties displayed by elements in the periodic table |
Atomic Mass Unit (amu) | One twelfth the mass of a carbon-12 atom |
Metals | Elements that are good conductors of heat and electric current |
Transition Metals | Elements that form a bridge between elements on the left and right sides of the periodic table |
Nonmetals | Elements that are poor conductors of heat and electric current |
Metalloids | 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 | The elements in Group 1A of the periodic table, not including Hydrogen |
Alkaline Earth Metals | The elements in Group 2A of the periodic table |
Halogens | The elements in Group 7A of the periodic table |
Noble Gases | The elements in Group 8A of the periodic table |