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Lanthanides metals are rare-earth metal often including  lanthanum and sometimes yttrium

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Halogens is a group that has five elements the same.

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Nitrogen Group has 5 electrons also Nitrogen is group 15.

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Boron is group 13 on the periodic table. And it has three electrons.

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Alkaline-Earth Metals are metal that don't reactive more than Alkali metals.

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Period means a row of elements that are the same

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Noble make a group of elements.

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Oxygen Group is number 16 and it also has 6 electrons.

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Carbon Group is number 14 and it also has 4 electrons.

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Actinides metals are mostly heavy radioactive metallic element.

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Transition Metals are a metal that is shiny and conduct electric very well.

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Alkali metals are when it have one negative charge. Also, the Alkali are on the left side.

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A element that is the same and works the same with every other element.