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Chapter 12 Vocab- periodic Table
Question | Answer |
---|---|
Periodic | describes something that occurs or repeat at regular intervals |
periodic law | states that the repeating chemical and physical properties of elements change periodically with the elements' atomic numbers |
period | in chemistry,a horizontal row of elements in the periodic table |
group | vertical column of elements on the periodic table |
alkali metals | are elements in group 1 of the periodic table |
alkaline-earth metals | are less reactive than alkali metals are. |
halogens | are very reactive nonmetals because their atoms to gain only one electron to have a complete outer level |
noble gases | are unreactive nonmetals and in group 18 of the periodic table. |