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38 Cards in this Set
- Front
- Back
isotope
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atoms of the same element that that differ in the number of nuetrons they contain
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compound
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substance formed by by the chemical combination of two or more elements in a definate proportions
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Ionic bond
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when one or more electrons are transfered from one atom to another
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ion
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positivley and negitivly charged atoms
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covalent bonds
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when electrons are shred between atoms
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cohesion
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attraction between molecules of the same substance
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adhesion
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attraction between molecules of different substances
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mixture
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a material composed of two or more elements or compounds that are physically mixed together but not chemically combined
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solution
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a type of mixture where ions gradually become dispersed
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solute
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the substance that is dissolved
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solvent
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the substance in which the solute dissolves
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suspention
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whne materials dont dissolve when place in a substance but separate into pieces so small that they dont settle out
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acids
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any compound that forms hydroxide ions in a solution
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base
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a compund that produces hydroxide ions in a solution
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buffer
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weak acids or bases that can react with strong acids or bases to prevent sharp sudden changes in pH
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momomer
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smaller units
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polymers
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are formed by monomers
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carbohydrates
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compunds made up of carbon, hydrogen and oxygen atoms. living things use carbs as their main source of energy
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monosaccharide
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single sugar molecules
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nuclic acids
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macromolecules containing hydrogen, oxygen, nitrogen, carbon and phosphorous
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nucleotide
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consist of three parts: 1) 5 carbon sugars, 2)a phosphate group, 3) nitrogenous base
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RNA
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contains sugar ribose
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DNA
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contains deoxyribose
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isotope
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atoms of the same element that that differ in the number of nuetrons they contain
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|
compound
|
substance formed by by the chemical combination of two or more elements in a definate proportions
|
|
Ionic bond
|
when one or more electrons are transfered from one atom to another
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|
ion
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positivley and negitivly charged atoms
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|
covalent bonds
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when electrons are shred between atoms
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|
cohesion
|
attraction between molecules of the same substance
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|
adhesion
|
attraction between molecules of different substances
|
|
mixture
|
a material composed of two or more elements or compounds that are physically mixed together but not chemically combined
|
|
solution
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a type of mixture where ions gradually become dispersed
|
|
solute
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the substance that is dissolved
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solvent
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the substance in which the solute dissolves
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suspention
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whne materials dont dissolve when place in a substance but separate into pieces so small that they dont settle out
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|
acids
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any compound that forms hydroxide ions in a solution
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|
base
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a compund that produces hydroxide ions in a solution
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|
buffer
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weak acids or bases that can react with strong acids or bases to prevent sharp sudden changes in pH
|