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The group contains nonmetals. Halogens are very reactive nonmetals because their atoms need to gain the missing electron.

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In the group nitrogen there are two nonmetals, two metalloids, and two nonmetals.

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The baron group contains one metalloids and five metals. The common element in group 13 is aluminum. The boron group is reactive.

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Elements in the first row that follow lanthanides and are called lanthanides. The lanthanides are shiny, reactive metals.

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Alkaline earth metals are very reactive but less than Alkali metals. They also have higher densities than alkali metals.

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Each row in the periodic table is called a period.

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Noble Gases are unreactive nonmetals. The group contains nonmetals that are in group 18.

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Oxygen makse 20% of our air. The oxygen group has three nonmetals, one metalloid, and one metal.

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The carbon group contains one nonmetal, two metalloids, and three metals. In the nonmetal group can found uncombined in nature.

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Elements in the second row that follow actinium are actinides. The atoms of actinides are radioactive, or unstable

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Transition metals have 1 or 2 outer layers of electrons. Transition metals are good conductors of thermal energy and electric current.

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Alkali Metals are soft enough to be cut with a knife. Alkali Metals also reacts when water forms to hydrogen gas.

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Each vertical column of elements on the periodic table is called a group.