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Chem 107 #1 UL

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Term
Definition
Statement summarizing past observations that is always the same under the same conditions   Law  
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statement explaining observations and laws   Theory  
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study of matter and the changes it undergoes   chemistry  
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anything that occupies space and has mass   Matter  
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Compounds and elements are examples of ____   Pure substances  
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Two examples of mixtures are ___ and ___   Homogeneous and heterogenous  
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Form of matter with definite composition and distinct properties   Pure substance  
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substance composed of only one kind of atom   Element  
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substance composed of two of more different elements chemically united in fixed proportions   Compound  
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__ change does not alter the composition identity of a material   Physical  
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__ change alters the composition of identity of the material involved   Chemical  
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__ property of a material depends on how much matter is considered. Examples: mass and volume   Extensive  
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___ property does not depend on how much matter is being considered. Examples: density and temperature   Intensive  
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Measure of the quantity of matter   mass  
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includes the force that gravity exerts on an object   weight  
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mass/volume   density  
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Significant figures; addition/ subtractions   least number of decimal places  
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Significant figures: multiplication/ division   least number of significant figures  
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How close a measurement is to the true value   Accuracy  
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how close a set of measurements are to each other   Precision  
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Elements are composed of extremely small particles called atoms   Dalton's atomic theory  
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All atoms of a given elements are identical, having the same size, mass and chemical properties. The atoms one element are different from the atoms of all other elements   Dalton's atomic theory  
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Atoms combine in simple, whole-number ratios to form compounds   Dalton's atomic theory  
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Different samples of the same compound always contain the same proportion of elements by mass   Law of definite proportions  
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Elements can combine in different ways to form different compounds, whose mass ratios are simple whole numbers   Law of multiple proportions  
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A chemical reaction involves only the separation, combinations, or rearrangement of atoms; it does not result in their creation of destruction   Dalton's Atomic Theory  
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Matter can neither be created nor destroyed   Law of conservation of mass  
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Basic unit of an element that can enter into chemical reaction   atom  
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The ___ was discovered by Joesph Thomson with the cathode ray tube   Electron  
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The __ by discovered Ernest Rutherford alpha particle scattering.   Proton  
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The ___ by discovered by James Chadwick   neutron  
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at least 2 distinct forms of an element have different properties   Allotrope  
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bond formed between two ions, a metal and nonmetal.   ionic  
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positively- charged ion, formed by losing electrons   cation  
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negatively- charged ion, formed by gaining electrons   anion  
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SCN-   thiocyanate  
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C2O4-2   Oxalate  
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IO-   Hypoiodite  
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IO-2   Iodite  
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IO-3   Iodate  
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IO-4   Periodate  
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Created by: laurenGfrazier
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