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ATS-Science 8
Periodic Table vocabulary
Term | Definition |
---|---|
periodic | describes something that occurs or repeats at regular intervals. |
periodic law | the law that states that the repeating chemical and physical properties of elements change periodically with the atomic numbers of the elements. |
period | in chemistry, a horizontal row of elements in the periodic table. |
group | a vertical column of elements in the periodic table; elements in a group share chemical properties. |
alkali metal | one of the elements of Group 1 of the periodic table (lithium, sodium, potassium, rubidium, cesium, and francium) |
alkaline-earth metal | one of the elements of Group 2 of the periodic table (beryllium, magnesium, calcium, stronium, barium, and radium). |
halogen | one of the elements of Group 17 of the periodic table (flourine, chlorine, bromine, iodine, and astatine); halogens combine with most metals to form salts. |
noble gas | one of the elements of Group 18 of the periodic table (helium, neon, argon, krypton,xenon, and radon)noble gases are unreactive. |