Chem 111-Unit 1
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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mega | 1 x 10^6
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kilo | 1x10^3
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deci | 1x10^-1
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centi | 1x10^-2
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milli | 1x10^-3
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micro | 1x10-6
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nano | 1x10^-9
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pico | 1x10^-12
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chemical change | changes into a different compound/element
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physical change | alignment of molecules changes
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potential energy | relates to position of an object
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kinetic energy | relates to motion of an object
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significant figures | all digits are significant except for 0s that are not measured- only there to hold the decimal place
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exact numbers (when doing sig figs) | have no uncertainty- infinite # of sig figs
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add'n/sub'n (when doing sig figs) | reported to the same decimal places as the least precise measurement
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mult/div (when doing sig figs) | reported to the fewest total sig figs
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both +/- AND */% (when doing sig figs) | order of operations!
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precision | how closely you can repeat a measurement
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accuracy | how close a measurement is to the actual value
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systematic error | results from setup of experiment/measurement errors (all too high or all too low)
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random error | unavoidable error that are not all too high or all too low
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Z | atomic number- # of protons in the nucleus
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isotope | differ by # if neutrons (which also changes the mass)
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A | mass number- number of protons+number of neutrons
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mass spectrometry | takes a sample- splits it based on mass & tells the relative percentage of each isotope in a sample
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atomic mass unit | (aka Daltons) 1/12 of a Carbon-12 atom by weight
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atomic mass | the weighted average of the masses of the naturally occurring isotopes based on their abundances in nature
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frequency | ν (nu) cycles/second or sec^-1 or Hertz
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wavelength | λ (lambda) meters, nanometers, picometers, angstroms
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speed of light | 2.998 x 10^8
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refraction | when a light wave passes from one medium to another, the speed of the wave changes
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diffraction | when a light wave strikes the edge of an object, it bends around it
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constructive interference | when two waves come together and combine
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destructive interference | when two waves come together and cancel one another out
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blackbody radiation | different wavelengths depending on temperature
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photoelectric effect | when you shine certain frequencies of light on an element, you can eject electrons- depending on the threshold of the element
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atomic emission | different colors are emitted for different elements when current flows through it (very specific wavelengths for each element)
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E= (modified to find wavelength) | hc/(lambda)
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attractive forces | below 0
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repulsive forces | above 0
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high magnitude | atoms are close together (regardless of sign)
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ground state | n=1
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as n approaches infinity... | energy increases (but if negative, never crosses 0)
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
melaniebeale
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