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| Pure Substance has definite physical and chemical properties.*Physical properties: has units in numbers eg; Density, Boiling Point |
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| *Chemical Property: Words to describe reactive property eg; Flammable, Toxic, Carcinogen, Skin Irritant |
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Element: can not be broken down into a simpler substance
Compound: Definite combination of elements |
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| Two or more substances mixed together |
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| Same composition through out mixture |
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| It is not the same through out the mixture eg;Smoke, Sea Water, Rock |
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| Separation of Liquids through distillation, or boiling point. |
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| How close are data runs- checked by statistics(mathematical average) |
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| How close to true value- checked by standard checks method. |
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| Hydrochloric Acid-Stomach Acid |
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| Sulfuric Acid-Car Batteries |
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| Phosphoric Acid- making drugs |
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| Physical Property to Separate Air |
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| Dalton and Thomson Atomic Theory |
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| Matter is composed of discrete units called atoms, as opposed to the obsolete notion that matter could be divided into any arbitrarily small quantity. If two elements can together form more than one compound, then the ratios of the masses of the second element which combine with a fixed mass of the first element will be ratios of small integers. Each chemical element is composed of atoms of a single, unique type, and though they cannot be altered or destroyed by chemical means, they can combine to form more complex structures. |
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| Sodium Hydroxide- Drain Cleaner |
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| Ca(OH)2 (Ca^+2 + 2(OH)^-) |
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| Mg(OH)2 (Mg^+2 + 2(OH)^-) |
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| Name the cation (element or compound with + charge), then name the anion (element or compound with - charge) |
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| Ni(NO3)2 (Ni^+2 + 2(NO3)^-) |
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