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Actinides are reactive and unstable.

This silver oval is part of an Actinide.

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Halogens are reactive nonmetals and gain 1 electron.

Chlorine is an object that's a Halogen.

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Lanthanides are very lustrous  and are reactive metals.

Some rocks are Lanthanides.

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They have 2 electrons to give away and have hight densities.

Calcium is an element that's in group 1.

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They have 3 electrons in the outer level and are reactive.

The Boron group has 6 elements.

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Noble gasses are unreactive metals and are odorless.

Helium is a Noble Gas.

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Alkali Metals are group 1 and they are very shiny and are silver colored elements.

There are 6 elements in group 1.

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Transition Metals are groups of elements and give away 1 or 2 electrons.

Ruthenium is an element that is considered as a transition metal.

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The carbon group are carbons that make proteins, fats and all that stuff we need.

Carbons can be found in trees.

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They have 5 electrons in the outer level and are room temperature elements.

The N in the periodic table is the Nitrogen Group.

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The Oxygen group is about Oxygen. It has six electrons on the outer level. It also helps living things.

Oxygen helps plants a lot.

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Horizontal rows that are in the periodic table.

There are periods in the rows of the periodic table.

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A group of elements that have the same chemical properties.

In the periodic table there are lots of groups.