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38 Cards in this Set

  • Front
  • Back
isotope
atoms of the same element that that differ in the number of nuetrons they contain
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
ion
positivley and negitivly charged atoms
covalent bonds
when electrons are shred between atoms
cohesion
attraction between molecules of the same substance
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
a type of mixture where ions gradually become dispersed
solute
the substance that is dissolved
solvent
the substance in which the solute dissolves
suspention
whne materials dont dissolve when place in a substance but separate into pieces so small that they dont settle out
acids
any compound that forms hydroxide ions in a solution
base
a compund that produces hydroxide ions in a solution
buffer
weak acids or bases that can react with strong acids or bases to prevent sharp sudden changes in pH
momomer
smaller units
polymers
are formed by monomers
carbohydrates
compunds made up of carbon, hydrogen and oxygen atoms. living things use carbs as their main source of energy
monosaccharide
single sugar molecules
nuclic acids
macromolecules containing hydrogen, oxygen, nitrogen, carbon and phosphorous
nucleotide
consist of three parts: 1) 5 carbon sugars, 2)a phosphate group, 3) nitrogenous base
RNA
contains sugar ribose
DNA
contains deoxyribose
isotope
atoms of the same element that that differ in the number of nuetrons they contain
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
ion
positivley and negitivly charged atoms
covalent bonds
when electrons are shred between atoms
cohesion
attraction between molecules of the same substance
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
a type of mixture where ions gradually become dispersed
solute
the substance that is dissolved
solvent
the substance in which the solute dissolves
suspention
whne materials dont dissolve when place in a substance but separate into pieces so small that they dont settle out
acids
any compound that forms hydroxide ions in a solution
base
a compund that produces hydroxide ions in a solution
buffer
weak acids or bases that can react with strong acids or bases to prevent sharp sudden changes in pH