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any of the seven chemical elements that make up Group 18  of the periodic table. The elements are helium, neon, argon,  krypton, xenon, radon.

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The halogens are located on the left of the noble gases on the periodic table.

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Group 16 of the periodic table  and is considered among the main group  elements. It consists of the elements oxygen, sulfur, selenium, tellurium and polonium

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The group consists of nitrogen , phosphorus, arsenic, antimony, bismuth

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The Carbon group  is a periodic table group  consisting of carbon , silicon , germanium , tin , lead, and flerovium

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The boron group  are the chemical elements in group  13 of the periodic table, comprising boron, aluminum, gallium, indium, thallium.

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Second rows under the periodic table.

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First group under the periodic table.

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All the transition metals have two electrons in their outermost shell.

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Are six chemical elements in column

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A group in periodic table.

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A unit of geologic time that is longer than an epoch but shorter than an era.

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A vertical column of elements in the periodic table; elements in a group share chemicals properties