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Chemistry test review 1

mapu182112's version from 2018-09-24 10:36

Section 1

Question Answer
atom Building blocks of matter
MoleculeTwo or more identical atoms acting as one unit
chemical propertyRefers to the ability of a substance to undergo a change that alters its identity.
physical changeA change that alters a substance without changing its identity or composition.
pure substanceOnly one type of matter that has to be separated by chemical means.
physical propertyCan be observed or measured without altering the identity of the material.
what three things do you look for to classify matter?Appearance, Bonding, and Composition
matterAnything that has mass and takes up space.
elementSimplest form of matter that cannot be broken down.
compoundTwo or more different elements
mixtureTwo or more compounds physically blended together
What separation techniques are used to physically separate a mixture?Filtration, Distillation, & Chromatography
Pure substances must be separated using _____________ means, like electrolysis.chemical
Physical Intensive PropertyDensity, Boiling Point, Melting Point
Physical Extensive PropertyWeight, Length, Volume
chemical changeAny change in which one or more substances are converted into different substances with new properties.
can a chemical change be reversed?no
homogeneous mixtureuniform, through one phase
heterogeneous mixturemore than one phase present
what three things do you look for to classify matter?appearance, bonding, and composition

Section 2