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chem midterm

TermDefinition
Steps of the scientific method 1.state a problem 2.gather information 3.form a hypothesis 4.perform an experiment 5. analyze data 6.form conclusion
the triple beam balance is used to measure __________ mass
a graduated cylinder is used to measure__________ liquid volume
a ruler is used to measure ______________ length
temperature at which water boils and freezes 100(degrees Celsius) 0(degrees celsius)
used to measure temperature thermometer
basic unit of mass kg(kilogram)
basic unit of liquid volume L(liter)
basic unit of solid volume cm3(cubic centimeter)
basic unit of length m(meter)
basic unit of time s(second)
each line on a ruler represents ________________ a millimeter
mass measure of matter in an object
length distance between two points
volume amount of space an object takes up
control standard to which test results can be compared
constant variable that dos not change when other variables do
independent variable changed to determine how it will affect the dependent variable
a factor that changes in an experiment from manipulation of the independent variable is the _________________ dependent variable
a testable prediction hypothesis
substances are either _______ or _________ elements or compounds
matter is classified as either ____ or _______ pure substances or mixtures
when two or more substances are combined so each substance can be separated by physical means the result is a ___________ mixture
pure substances that are made of more than one element compunds
a solution one substance dissolved in another
a suspension a type of heterogeneous mixture whose particles settle over time and can be separated from the mixture by filtration
if the density of an object is less than the density of the fluid displaced by the object , the object will ________ float
the melting point is the same temperature as the _________ freezing point
phase change from liquid to gas vaporization
phase change from gas to liquid condensation
matter that has a definite volume but no definite shape liquid
matter that has a definite volume and a definite shape solid
matter that has no definite shape or volume gas
matter whose particles move faster and farther apart gas
discovered the proton using the gold foil experiment rutherford
discovered the neutron using the cathode ray chadwick
discovered the elctron j.j thomson
said that matter was made out of small round particles dalton
said that all atoms of an element were identical dalton
in a nuetral atom _________ equals _______ protons equals elctrons
valence electrons are the electron found in the _______________ outer shell
the region around the nucleus occupied by the electron electron cloud
elements that lay along the stair - step line of the periodic table metalloids
nonmetals tend to ____ valence electrons gain
particles that make up the atomic mass protons and nuetrons
charge of a proton +1
charge of a nuetron 0
charge of an electron -1
metals ______ valence electrons lose
group 1 alkali metals
group 2 alkaline earth metals
group 3-12 transition metals
group 13 boron group
group 14 carbon group
group 15 nitrogen group
group 16 oxygen group
group 17 halogen group
group 18 noble gases
a bond between a metal and metal metallic bond
bond between a metal and nonmetal ionic
bond between nonmetal and nonmetal covalent
bond when an equal exchange of electrons is shared ionic
bond when atoms share electrons covalent
polyatomic ion covalently bonded compound of nonmetals that has a charge
an ion charged atom
unit for density g/mL g/cm3
Created by: kylamcclendo
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