Transition Work Flashcards
accurate
close to true value
precise
when repeat measurements are consistent/agree closely with each other
repeatability
how precise repeated measurements are when they are taken by the same person, using the same equipment, under the same conditions
reproducibility
how precise repeated measurements are when they are taken by different people, using different equipment
the uncertainty of a measurement
the interval within which the true value is expected to lie
measurement error
the difference between a measured value and the true value
random error
results varying around the true value in an unpredictable way
systematic error
a consistent difference between the measured values and true values
zero error
a measuring instrument gives a false reading when the true value should be zero
fair test
fair test
proton mass
1
proton charge
+1
neutron mass
1
neutron charge
-1
electron mass
1/1840
what force holds an atomic nucleus together?
strong nuclear force
isotope
an atom with the same number of protons but different number of neutrons
function of a mass spectrometer
it accurately determines the mass and abundance of separate atoms or molecules, to help us identify them
mass spectrum
the output from a mass spectrometer that shows the different isotopes that make up an element
what is the total number of electrons that each
electron shell (main energy level) can contain?
2n^2 electrons, where n is the number of the shell
how many electrons can the first three electron shells hold each?
2 electrons (first shell), 8 electrons (second shell), 18 electrons (third shell)
what are the first four electron sub-shells (orbitals) called?
s, p, d, and f
acronym for the first four electron sub-shells (orbitals) called?
Small Pretty DragonFlies
how many electrons can each orbital hold?
a maximum of 2 electrons
