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Halogens have nonmetals and has 7 electrons in the outer level. It is also very reactive. Halogens are missing one electron so it combines with the Alkali Metals to be complete. This makes salt.

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The Nitrogen group has 2 nonmetals, 2 metals, and 2 metalloids. It has 5 electrons in the outer level. Its reactivity depends on on the element. Nitrogen is in the air and is 80% of the air we breathe.

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The Boron group has 1 metalloid and 5 metals they have 3 electrons in the outer shell. It is reactive. One common element is aluminum.

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Lanthanides are metals at the bottom of the periodic table of elements and are shiny reactive metals.

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Alkaline Earth Metals are metals found in group 2. These metals are a little less reactive than group 1. Alkaline Earth Metals have 2 electrons in the outer level shell. This makes it harder for there electrons to combine

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Actinides are radioactive or unstable. Atoms of radioactive elements can change into another element. After element 94, the rest of elements cannot bfound in nature.

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A period means regular repeating. In the Periodic Table of Elements there are 7 periods going horizontal.

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Noble gases have nonmetals and have 8 electrons in the outer level. These elements cannot gain or loose electrons.

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The Oxygen group has 3 nonmetals, 1 metal, and 1 metalloids. It has 6 electrons in the outer level. It is also reactive. 20% of our air is oxygen and oxygen helps stuff burn.

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The Carbon group has 1 nonmetal 2 metalloid and 3 metals. It has 4 electrons on the outer level and its reactivity depends on the element. Carbon in the Carbon group is found uncombined and is used to make compounds such as proteins, fats, and carbohydrates.

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Transition Metals are groups 3-12 and they don't give away there electrons easily. These metals are less reactive than groups 1 and 2.

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Alkali metals are in group 1 and share physical and chemical properties. These are very reactive metals.

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In the Periodic Table of Elements  the vertical column is a group. When they are in the same group they have similar physical and chemical properties, this is known as a family.