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Definition
| describes something that occurs or repeats at regular intervals |
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Term
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Definition
| the law that states that the repeating chemical and physical properties of elements change periodically with the atomic numbers of the elements |
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Term
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Definition
| one of the elements of group1 of the periodic table; most reactive elements |
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Term
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Definition
| one of the elements of group2 of the periodic table |
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Term
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Definition
| one of the elements of group17 of the periodic table; they combine with most metals to form salts |
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Term
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Definition
| one of the elements in group18 of the periodic table; unreactive because their outermost electron shell is full |
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