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S8P1.f
Recognize that there are more than 100 elements and some have similar properties
| Question | Answer |
|---|---|
| periodic table | a chart that organizes information about all known elements according to their properties |
| period | in chemistry a horizontal row of elements in the periodic table |
| group | a vertical column of elements in the periodic table |
| valence electrons | an electron that is found in the outermost shell of an atom and that determine the atom's chemical properties |
| reactivity | describes how likely an element is to from bonds with other elements |
| metalloids | elements that have nonmetal and metal properties |