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chapter12 vocab.
periodic table
| term | definition |
|---|---|
| period | in chemisty a horizontal row of elements in the periodic table |
| group | a vertical column of elements in the periodic table |
| alkali metal | one of the elements of group 1 of the periodic table |
| alkaline earth metal | one of the elements of group 2 of the periodic table |
| halogen | one of the elements of group 17 of the periodic |
| noble gas | one of the elements of group 18 of the periodic table |
| periodic | describes something that occurs or repeats at regular intervulvals |
| periodic table | the law that states that the repeating chemical and physical properties of elements change periodically with the atomic numbers of the elements |