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Chapter 5 Vocab
Physical Science
Term | Definition |
---|---|
Periodic Table | Arrangement of elements in columns, based on a set of properties that repeat from row to row. |
Period | Each row in the periodic table. |
Group | Each column on the periodic table. |
Periodic Law | Properties of elements that repeat themselves in predictable ways. |
Atomic Mass Unit (AMU) | One twelfth the mass of a carbon-12 atom. |
Metals | Elements that are good conductors of of electric current and heat. |
Transition Metals | Elements that form a bridge between the elements on the left side of the table to the right. |
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 | Elements in group 1A . |
Alkali Earth Metals | Elements in group 2A. |
Halogens | Elements in group 7A. |
Noble Gases | Elements in group 8A. |