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Science/ elements
periodic table of elements
| Question | Answer |
|---|---|
| element | a pure substance that can't be separated or broken down into simpler substances by physical or chemical means |
| nonmetals | elements that are dull & are poor conductors of thermal energy & electric current |
| pure substance | a substance in which there is only one type of particle includes elements and compounds |
| metalloids | elements that have properties of both metals & nonmetals; sometimes refered to as semi conductors |
| metals | elemnts that are shiny and are good conductors of thermal energy & electric currrent; most metals are malleable & ductile |
| periodic | elements that are ordered |
| periodic law | states that the chemical or physical properties of elements are periodic functions of their atomic numbers |
| period | a horizontal row on the periodic table |
| group | a column of elements on the periodic table |
| akali metals | the elements in group 1 of the periodic table; they are the most reactive metals |
| akaline earth metals | the elements in group 2 of the periodic ; they are reactive but less reactive than the akali metals |
| halogens | the elements in group 17 of the periodic table; they are very reactive nonmetals, & their atoms have 7 electrons in their outer level |
| noble gases | the unreactive elements in group 18 of the periodic table; their atoms have 8 electrons on their outer level |
Created by:
Jman08
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