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Chapt 12 Vocabulay(:
Chapter 12 Vocabular
Vocabulary | Definition |
---|---|
Periodic- | Describes something that occurs or repeat at reaular 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 perodic table(lithium, sodium, potassium, rubidium, cesium, and francium) |
Alkali-earth metal- | one of the elements of Group 2 of the periodic table(beryllium, magnesium, calcium, strontium, and radium) |
Halogen- | one of Group 17 of the periodic table(fluorine, chorine, bromine, iodine, and astatine); halogens combine with most metals to form salt |
Nobel gas- | one of the elements of Group 18 of the periodic table(helium, neon, argon, krypton, xenon, and radon); noble gases are unreactive |