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Periodic Table Notes
WSHS - Physical Science - Periodic Table Notes - Stevens/Tedder
| Question | Answer |
|---|---|
| Dmitiri Mendeleev | a Russian Chemist who arranged the elements in rows of increasing mass with similar properties |
| Period | horizontal rows |
| Group | vertical column |
| periodic law | the pattern of repeating properties |
| metal properties | good conductor of heat and electricity; ductibility; malleable; solid at room temperature |
| Malleable | able to be beat into a sheet; ie aluminum |
| Ductile | able to be made into a wire |
| Non-metal properties | poor conductors of heat and electricity; gases at room temperature; low boiling point; solids are brittle at room temperature |
| Metalloids | their properties are a combination of metals and non-metals |
| Valence electron | the number of electrons in the outer energy level; they allow atoms to interact and form bonds |
| Aluminum | the most abundant element |
| carbon | the basis of all living things |
| Fluorine | help prevent tooth decay |
| chlorine | help sanitize water |
| calcium | build strong bones |
| 2 | maximum number of elements on the first energy level |
| 8 | maximum number of elements on the second energy level |
| 18 | maximum number of elements on the third energy level |
| 32 | maxiumum number of elements on the fourth energy level |
| Right side | side of periodic table that has the greatest number of valence electrons |
| metals | the majority of element on the periodic table |