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group 8 is nobel gases that contains 8 outside atoms and all of the substance in the group are unreactive and are nonmetals.

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when something is repeatedly repeated.

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its a verticle line in the periodic table

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89-13 group 7 are actinides these substance a really dangerous because it has radioactive the element that can change into atoms of another element and it is

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group 7 is halogens and it has 7 outside electrons. the whole group is  very reactive and are nonmetals.

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group 4 is carbon group which has 4 electrons outside. Reactivity varies among the elements and carbon is uncombined in nature.

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group 3 is the boron group that has 3 electrons outside and these substance are reactive.

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57-71 group 6 are lanthanides and these group metals are  shiny, and reactive.

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group 6 is oxygen group its group has 6 outside electrons.
20% of oxygen we breathe only 20% because nitrogen contains 80%

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Transition metals are groups 3-12 and contain 1-2 outer electrons

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group 5 is nitrogen group that contains 5 outside electrons. Nitrogen is 80% of the air we breathe.

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these metals are different because they are less reactive and they are group 2 in the periodic table

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metals in the first period of the periodic table.