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Density, Elements v Compounds, Physical v Chemical Changes

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Term
Definition
physical characteristics   characteristics observed or measured. does Not change the identity of the substance  
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chemical characteristics   ability to change into a NEW substance with different properties  
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production of gas   Bubbles, Foaming, Fizzing, Smoke, Odor  
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color change   A different color appears. *Not always chemical  
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formation of percipitiate   Cloudiness, foggy, Solid at the bottom  
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change in heat or light energy   Temperature Increase, Temperature Decrease, Spark, Explosion, Glowing  
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element   PURE Substance, One kind of atom, Same "shape"  
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element symbol   shown by 1-2 letters. 1st letter is always Capital, 2nd is lowercase. Ex: Na  
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compound   More than one kind of atom. Different "shapes" Ex: H2O  
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subscript   tells you how many atoms of each element the compound has.  
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no subscript   only has one atom of that element  
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metals   to the Left of the zigzag. Solid at room temp. (except Mercury). Good conductors. Metallic. Ductile. Malleable  
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metalloids   on the zigzag. Share properties of metals and nonmetals. Ex: B, Si, Ge, As, Sb, Te, Po  
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nonmetals   to the Right of the zigzag. Solid, liquid or gas at room temp. Poor conductors. Brittle. Not metallic.  
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metallic   Shiny  
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ductile   ability to be pulled into wire  
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malleable   ability to be hammered into sheet  
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Created by: ScienceRMS6
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