click below
click below
Normal Size Small Size show me how
Chapter 5 Vocab
Chapter 5 Vocabulary
Term | Definition |
---|---|
Periodic Table | Arrangement of elements in columns, based on set of properties that repeat from row to row. |
Period | A row in a table of elements, the time required for one complete cycle of a periodic motion, a motion of geologic time into which geologists divide eras. |
Group | A column of elements on the 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 between 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. |
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 element in Group 8A of the periodic table. |
Alkali Metals | The elements in group 1A. |
Alkali Metals | The elements in group 1A |