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B2 Ch 3 Lesson 2
Organizing the Elements
Term | Definition |
---|---|
Atomic Mass | The average mass of all the isotopes of an element. |
Periodic Table | An arrangement of elements showing the repeating pattern of their properties. |
Chemical Symbol | A one or two letter representation of an element. |
Period | A horizontal row of elements in the periodic table. |
Group | Elements in the same vertical column of the periodic table; also called family. |