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chapter 12 vocabulary PeriodicTable
Question | Answer |
---|---|
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 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 chmical properties |
Alkali Metals | One of the elements of group 1 of the periodic table(lithium, Sodium, Potassium, Rubidium,cesium,and francium) |
Alkaline-earth Metal | Oneof the elements of group 2 of the periodic table.(beryllium, magnesium, calcium, strondium, barium, and radium) |
Halogens | One of the element, ofgroup 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, radon); noble gas are inactive |