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30 terms

Chapter 4: elements coumpounds mixtures

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element
substances that cant be chemically broken down into simpler substances
compound
a substance made up of two or more elements that are chemically combined
mixture
two or more substances that are not chemically combined-they are physically combined
pure substance
any element or compound
molecule
smallest part of a substance that has all the properties of that substance and contains 2 or more elements
chemical bond
force of attraction that holds atoms together
dissolve
go into solution
solution
mixture in which the particles of one substance are evenly mixed with the particles of another substance
solvent
substance in which a solute dissolves
soluble
able to dissolve
solubility
ability on one substance to dissolve in another at a given temperature
insoluble
NOT able to dissolve
suspension
mixture of two materials or more that separate on standing( let it sit there for a while)
colloid
suspension in which the particles are permanently suspended
colloids:examples
jello, whipped cream, smoke, paint
suspensions:examples
salad dressing, orange juice, muddy water, snow globe
solutions:examples
salt water, sugar water, coffee
elements:examples
carbon, copper, zinc, aluminum
homogeneous mixture
substances in the mixture are evenly spread out- same throughout
heterogeneous mixture
substances are UNEVENLY spread out- can be seperated, filtered, a suspensioin is this type of mixture
compounds:examples
water H20, salt NaCl, carbon dioxide CO2
physical property
characteristic of a material that can be seen ex. density, thermal conductor, state of matter, size, shape
physical change
change in color,shape, size or state of matter
chemical property
characteristic of a substance that indicates whether it can make a chemical change like flamibility or reactivity with oxygen
chemical change
change of a substance to a completely different substance
metals
left of the zigzag line, shiny, malleable, ductile, good conductors of electric current, good conductors of thermal energy
nonmetals
right of the zigzag line, not malleable/ductile, not shiny, poor conductors
metalliods
have some properties of metals and some properties of nonmetals, semiconductors, found along the zigzag line,
Phase
another term for state of matter: solid, liquid, gas, plasma
universal solvent
water