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chem test 2
test 2
36
Chemistry
Undergraduate 1
02/23/2011

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Term

wavelength


Definition
the distance between identical points on successive waves
Term
frequency
Definition
the number of waves that pass through a particular point in 1 second
Term
amplitude
Definition
the vertical distance from the midline of a wave to the peak or trough
Term
the equation for the speed of a wave
Definition
speed of a wave=wavelength x frequency
Term
electromagnetic wave
Definition
has an electic field component and a magnetic field component
Term
electromagnetic radiation
Definition
the emission and transmission of energy in the form of electromagnetic waves
Term
wavelength= speed/frequency
Definition
how to calculate the wavelength of a photon
Term
frequency= speed of light (wave)/wavelength
Definition
how to calculate the frequency of a wave
Term
quantum
Definition
the smallest quantity of energy that can be emitted (or absorbed) in the form of electromagnetic radiation
Term
the equation for the quantum of energy
Definition
E (quantum of energy)= h (planck's constant) x frequency (v)
Term
6.63 x 10 ^-34 jxs
Definition
Planck's constant
Term
photoelectric effect
Definition
when electrons are ejected from the surface of certain metals exposed to light of at least a certain minimum frequency
Term
hv=KE + W or KE=hv-W
Definition
the equation of the photoelectric effect
Term
E(n)= -R (h) x(1/n^2)
Definition
equation of energy of an electon in the nth state in a hydrogen atom
Term
2.18x10^-18 J
Definition
rydberg constant=R(h)=?
Term
change in E=hv=R(h) x(1/(ni)^2-1/(nf)^2)
Definition
energy of a photon absorbed or emitted as the electron undergoes a transition from the ni level to the nf level
Term
10^-9
Definition
how many nano meters are in one meter
Term
wavelength=h/(mu); where u is velocity
Definition
the equation relating wavelength of a particle to its mass and velocity
Term
heisenberg uncertainty
Definition
it is impossible to know simultaneously both the momentum p(mass x volume) and the position of a particle with certainty
Term
n
Definition
the principle quantum number
Term
L
Definition
the angular momentum quantum number
Term
m (L)
Definition
the magnetic quantum number
Term
m (s)
Definition
the electron spin quantum number
Term
electron density
Definition
gives the probability that an electron will be found in a particular region of an atom
Term
atomic orbital
Definition
the wave function of an electron in an atom
Term
pauli exclusion principle
Definition
the principle states that no two electrons in an atom can have the same set of four quantum numbers
Term
0=s, 1=p, 2=d, 3=f, 4=g, 5=h
Definition
the value of L (0-5) is designated to what orbital names?
Term
+1/2 and -1/2
Definition
what are the values of spin quantum numbers? (m(s))
Term
paramagnetic
Definition
contain net unpaired spins and are attracted by a magnet
Term
diamagnetic
Definition
do not contain net unpaired spins and are slightly repelled by a magnet
Term
hunds rule
Definition
the most stable arrangements of electrons in subshells is the one with the greatest number of parralel spins
Term
aufbau principle
Definition
as protons are added one by one to the nucleus to build up the elements, electrons are similarly added to the atomic orbitals
Term
transistion metals
Definition
have incompletely filled d subshells or readily give rise to cations that have incompletely filled d subshells
Term
lanthanides, or rare earth series
Definition
have incompletely filled 4f subshells or readily give rise to cations that have incompletely filled 4f subshells
Term
actinide series
Definition
the last row of elements in which most are not found in nature but have been synthesized
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