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A family or group is a group where elements belong.Organized by their characteristics.

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Halogens are the 17th group in the periodic table.Halogen contains flourine,chlorine,iodine, bromine,and astatine.

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Oxygen group is the 16th group and oxygen is needed for substances to burn.

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The nitrogen family has nitrogen(N), phosphorus (P), arsenic (As), antimony (Sb), bismuth (Bi),and ununpentium (115)

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The carbon group is a periodic table group making up of carbon,germanium,tin,lead,and flerovium.

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Group 13 contains one metalloid and five metals,the most common element  in group 13 is aluminum.

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These are the two rows under periodic table,Only a single element of a series is radioactive.

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The lanthanides series is the third group and contains Rare-earth like metals.

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Groups 3-12 do not have names,the atoms do not give away their electrons,they are less reactive than alkali metals.

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Alkaline-earth Metals is the 2nd group containing less reactive metals than alkaline metals.

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Alkali metals are found in group 1 in the periodic table.These metals include lithium,sodium,potassium and etc

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The periodic table has seven periods.Period only contains two elements hydrogen,and helium.

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In chemistry family means a group of elements that have similar properties.