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Ty Phy Sci Chpt 12
The Periodic Table
| Question | Answer |
|---|---|
| a regular, repeating pattern | periodic |
| states that the chemical and physical properties of elements are periodic functions of their atomic numbers | periodic law |
| each horizontal row (from left to right) on the periodic table | period |
| each column of elements (from top to bottom) on the periodic table | group |
| How are the elements arranged in the modern periodic table? | by increasing atomic number |
| elements that are shiny and are good conductors of thermal energy and electric current; most are malleable and ductile | metals |
| elements that are dull and are poor conductors of thermal energy and electric current | nonmetals |
| elements that have properties of both metals and nonmetals; sometimes referred to as semiconductors | metalloids |
| elements in Group 1 of the periodic table; most reactive metals; atoms have one electron on their outer level | alkali metals |
| the elements in Group 2 of the periodic table; they are reactive,but less so than alkalies; have two electrons on their outer levels | alkaline-earth metals |
| elements in Group 17 of the periodic table; very reactive nonmetals; have 7 electrons on their outer level | halogens |
| unreactive elements in Group 18 on the periodic table; have 8 electrons on their outer levels | noble gases |
| In which groups are the unreactive nonmetals found? | noble gases, Group 18 |
| What are some properties of halogens? | have 7 electrons on their outer level, are very reactive, are poor conductors of electric current |
Created by:
beth2244
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