Chemistry – Chemistry Test Answers – Flashcards
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Mg |
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Magnesium |
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N |
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Nitrogen |
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C |
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Carbon |
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F |
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Fluorine |
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Ne |
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Neon |
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O |
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Oxygen |
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Na |
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Sodium |
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B |
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Boron |
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Be |
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Beryllium |
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Al |
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Aluminum |
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Si |
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Silicon |
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S |
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Sulfur |
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P |
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Phosphorus |
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Ar |
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Argon |
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Ar |
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Argon |
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Cl |
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Chlorine |
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Sc |
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Scandium |
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K |
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Potassium |
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Ti |
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Titanium |
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Ca |
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Calcium |
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Fe |
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Iron |
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V |
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Vanadium |
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Co |
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Cobalt |
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Cu |
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Copper |
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Ni |
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Nickel |
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Ga |
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Gallium |
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Zn |
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Zinc |
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As |
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Arsenic |
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Ge |
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Germanium |
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Sr |
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Strontium |
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Ag |
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Silver |
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Br |
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Bromine |
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Se |
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Selenium |
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Rb |
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Rubidium |
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Kr |
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Krypton |
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Sb |
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Antimony |
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Sn |
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Tin |
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Cs |
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Cesium |
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I |
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Iodine |
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Pt |
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Platinum |
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H |
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Hydrogen |
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Ba |
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Barium |
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Hg |
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Mercury |
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Au |
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Gold |
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Cr |
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Chromium |
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Mn |
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Manganese |
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(C2H302)-1 |
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Acetate |
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(NH4)+1 |
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Ammonium |
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Pb |
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Lead |
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Bi |
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Bismuth |
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(CN)-1 |
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Cyanide |
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(CO3)-2 |
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Carbonate |
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(ClO2)-1 |
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Chlorite |
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(ClO3)-1 |
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Chlorate |
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(CrO4)-2 |
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Chromate |
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(H2PO4)-1 |
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Dihydrogen Phosphate |
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(Cr2O7)-2 |
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Dichromate |
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(HCO3)-1 |
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Hydrogen Carbonate (Bicarbonate) |
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(HPO4)-2 |
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Hydrogen Phosphate |
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(OH)-1 |
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Hydroxide |
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(ClO)-1 |
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Hypochlorite |
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(MnO4)-1 |
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Permanganate |
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(MnO4)-1 |
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Permanganate |
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(NO3)-1 |
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Nitrate |
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(NO2)-1 |
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Nitrite |
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(ClO4)-1 |
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Perchlorate |
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(PO3)-3 |
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Phosphite |
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(PO4)-3 |
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Phosphate |
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(SO4)-2 |
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Sulfate |
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(C2O4)-2 |
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Oxalate |
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(SCN)-1 |
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Thiocyanate |
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(SO3)-2 |
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Sulfite |
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Li |
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Lithium |
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He |
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Helium |
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Matter |
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Anything that has mass and occupies space; Solid, liquid, gas; Solid- Fixed shape and volume Liquid- Has fixed volume but is not rigid in shape-takes shape of container Gas-Nor a fixed volume nor a rigid shape |
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Pure Substances (Fixed composition and a unique set of properties) |
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Elements Compounds |
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Mixtures- Composed of two or more substances |
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Heterogeneous (Coarse) Homogeneous (Solutions) |
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Element |
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Type of matter that cannot be broken down into two or more pure substances 113 known elements, 91 occur naturally Identified by its symbol consisting of one or two letters, usually derived from its name, or latin name |
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Compound |
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A pure substance containing more than one element eg: Water is a compound of hydrogen and oxygen Have fixed compositions- A given compound always contains the same elements in the same percentages by mass To resolve compounds into elements, different methods can be used. Heat, Electrolysis |
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Mixture |
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A mixture contains two or more substances combined in such a way that each substance retains its chemical identity. Homogeneous- Composition is the same throughout. Another name is solution, made up of solvent, and solute. Heterogeneous- Composition varies throughout i.e. Rocks. Many different methods can be used to seperate the components of a mixture. Filtration, Distillation, Chromatography All gaseous mixtures including air are solutions |
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Scientific measurements |
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Metric system |
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Mega (M) |
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10^6 |
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Kilo (k) |
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10^3 |
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Deci (d) |
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10^-1 |
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Centi (c) |
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10^-2 |
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Milli (m) |
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10^-3 |
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Micro |
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10^-6 |
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Nano (n) |
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10^-9 |
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Pico (p) |
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10^-12 |
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Length - Meter |
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1 cm = 10^-2m 1 mm = 10^-3m 1 km = 10^3 m 1 nm = 10^-9m |
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Volume - Cubic centimeters Liters Millimeters |
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1 cm(3) = (10^-2m)cubed = (10^-6m) cubed 1 L = (10^-3m) cubed = (10^3cm) cubed I mL= (10^-3L)= (10^-6m)cubed 1 mL = 1 cm cubed |
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Mass - Grams Kilograms Milligrams |
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1 g = (10^-3kg) 1 mg= (10^-3g) 1 Mg= (10^6 g) = (10^3)kg |
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Mass |
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Measure of the amount of matter in an object |
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Weight |
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Measure of gravitational force acting on the object Determine mass by weighing |
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Temperature |
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Celsius (C) Kelvin (K) Fahrenheit (F) |
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Intensive properties |
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Must be independent of amount |
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Extensive properties |
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Dependent on amount (mass and volume) |
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Chemical properties |
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These are observed when the substance takes part in a chemical reaction, which converts it into a new substance. |
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Physical properties |
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Observed without changing the chemical identity of a substance. (Melting point, boiling point) |
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Equation for density |
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d=m/v |
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Solubility |
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The process by which a solute dissolves in a solvent. (Physical) Number of grams of the substance that dissolves in 100 g of solvent at a given temperature. |
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Saturated |
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The point at which a solution of a substance can dissolve no more of that substance. This point, the saturation point, depends on the temperature of the liquid as well as the chemical nature of the substances involved. |
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Unsaturated |
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Being able to dissolve more solute. |
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Supersaturated |
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If a change in conditions (e.g. cooling) mean that the concentration is actually higher than the saturation point, the solution has become supersaturated. |
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Supersaturated |
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If a change in conditions (e.g. cooling) mean that the concentration is actually higher than the saturation point, the solution has become supersaturated. |
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John Dalton's Atomic Theory |
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An element is composed of tiny particles called atoms. In an ordinary chemical reaction, atoms move from one substance to another, but no atoms of any element disappears or is changed into an atom of another element. Compounds are formed when atoms of two or more elements combine. |
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Law of conservation of mass |
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There is no detectable change in mass in an ordinary chemical reaction. If atoms are conserved in a reaction, mass will be conserved. |
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Law of constant composition |
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This tells us that a compound always contains the same elements in the same proportions by mass. If the atom ratio of the elements in a compound is fixed, their proportions by mass also be fixed. |
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Law of multiple proportions |
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When two elements form more than one compound. In these compounds, the masses of one elementthat combine with a fixed mass of the second element are in ratio of small whole numbers. |
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Electrons |
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Carry a negative charge They are equal to protons Found in an outer region if an atom where they form what amounts to a cloud of negative charge. |
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Protons |
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Positively charged Cancel out electrons Found in the nucleus |
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Neutrons |
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Neutral charge In the nucleus |
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Atomic Number |
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Number of protons and electrons In a neutral atom, protons and electrons are the same |
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Mass number |
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protons + neutrons |
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Isotopes |
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Atoms that contain the same number of protons but a different number of neutrons |
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Nuclear symbol |
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Mass number (top), Atomic number (bottom) Element symbol |
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Periods |
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Horizontal rows in the periodic table |
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Groups |
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Vertical columns in the periodic table |
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Main group elements |
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1 2 13 14 15 16 17 18 |
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Transition metals |
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Groups 3-12 |
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Post transition metals |
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13 14 15 |
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Alkali metals |
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Group 1 at the far left of the table |
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Alkaline earth metals |
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Group 2 |
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Halogens |
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Group 17 |
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Noble (Unreactive) gases |
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Group 18 |
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Molecule |
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Two or more atoms that may combine with one another to form an uncharged molecule.Held by strong forces called covalent bonds. Mostly represented by molecular formulas. |
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Ion |
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When an atom loses or gains electrons |
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Cations |
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Metal atoms typically tend to lose electrons to form positively charges ions called cations. |
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Anions |
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Nonmetal atoms form negative ions by gaining electrons. They are called anions. |
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Ionic bonds |
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The electrical forces between oppositely charged charged ions that hold together compounds. |
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Naming Ions |
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Monoatomic cations take the name of the metal from which they are derived. Roman numerals to distinguish charge. Named by adding suffix -ide to the stem of the name of the nonmetal from which they are derived. |
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Ionic compounds |
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First word names the cation Second names the anion |
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Binary molecular compounds |
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Two nonmetals First word gives the name of the element w/ Greek prefix Second word consists of appropriate Greek prefix, stem of the name, the suffix ide. |
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Di- Tri- Tetra- |
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2 3 4 |
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Penta- Hexa- Hepta- |
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5 6 7 |
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Octa Nona Deca |
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8 9 10 |
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Oxoacids |
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Oxygen and hydrogen |