Atomic Radius trend on the periodic table.... - increases the sizes as you move left and downwards on the table., Elements become more metallic.......... - are harder than the other elements and as you move to the left and downwards on the periodic table., Alkali and Alkaline Earth metals become - more reactive as you move down a group., Halogens become - less reactive as you move down a group, Electron affinity - increases as you move to ther right and up on the periodic table, Noble or inert gases - This are the elements that do not react with the others because they have a full valence shell., Alkali metals - These are the group 1a metals that are highly reactive , Alkaline Earth metals - The highly reactive metals that forms group 2a on the periodic table, transitions metals - The set of metallic elements occupying a central block (Groups IVB–VIII, IB, and IIB, or 4–12) in the periodic table, Halogens - These are reactive nonmetallic elements that form strongly acidic compounds with hydrogen from which simple salts can be made. They are found in group 17a, Period - A row of chemical elements in the periodic table. They all have the same number of electron shells., Group - A column of elements in the periodic table that have similar reactivity and properties.,

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