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Ty Phy Sci Chpt 4

Elements, Compounds, and Mixtures

QuestionAnswer
a pure substance that cannot be separated into simpler substances by physical or chemical means element
a substance in which there is only one type of particle pure substance
elements that are shiny and are good conductors of thermal energy and electric current metals
elements that are dull (not shiny) and that are poor conductors of thermal energy and electrical current nonmetals
also called semi-conductors, are elements that have properties of both metal and nonmetals metalloids
List properties that can be used to classify elements. melting point, boiling point, density, reactivity with acid, color, hardness, texture, flammability
Which category of element would be the least appropriate choice for making a container that can be dropped without shattering? Why? nonmetals; because they tend to be brittle and would most likely crack when dropped
a pure substance composed of two or more elements that are chemically combined compound
What type of change is needed to break down a compound? a chemical change
a combination of two or more substances that are not chemically combined mixture
a mixture that appears to be a single substance but is composed of particles of two or more substances that are distributed evenly among the others solution
the substance that is dissolved solute
the substance in which the solute is dissolved solvent
a measure of the amount of solute dissolved in a solvent concentration
the amount of solute needed to make a saturated solution using a given amount of solvent at a certain temperature solubility
a mixture in which particles of a material are dispersed throughout a liquid or gas but are large enough that they settle out suspension
a mixture in which the particles are dispersed throughout but are not heavy enough to settle out colloid
List methods of making a solute dissolve faster. mixing, heating, or crushing
Created by: beth2244
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