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Periodic Table 8th grade

Periodic Table 8th grade

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Tags: science   chemistry   high school   hs-ps1-2   ngss   ps1-2   periodic   table   terms  

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Periodic Table
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A chart of the known chemical elements arranged in order of atomic number
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Group (or Family)
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A vertical column of elements on the periodic table that share similar chemical properties & the same number of valence electrons.
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Period
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A horizontal row on the periodic table where all of the elements share the same number of electron shells in their atoms.
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Metals
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Elements that share physical properties like being a conductor, ductility & malleability. Found in the middle & left sides of PT
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Nonmetals
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Elements that are usually insulators, dull or brittle. Many are gases. Found on the right side of PT.
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Noble Gases
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Group 18 on the periodic table; includes Helium, Neon, and Argon. These elements are very unreactive.
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Valence Electrons
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Electrons in the outermost shell of an atom. These electrons are responsible for chemical reactivity.
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Metalloids
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Elements that share properties of metals & non-metals; sometimes called semi-conductors. Found along the zig-zag line on the PT.
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Reactivity
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Ability to react with other substances. Examples: ability to rust, ability to tarnish.
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Flammability
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The ability to burn.
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