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Unit 2A
Periodic Table and terminolgy
| Question | Answer |
|---|---|
| The horizontal rows are called | periods |
| Each new period indicates | the opening of the next main electron energy level |
| The larger the period an element is found in | the further the electron is away from the nucleus |
| valence electrons | The properties of an element depend on the number of electrons in the outermost shell |
| Group A number | Quantity of valence electrons |
| group B | transition elements |