Chapter 6 Flashcards
(37 cards)
in which ways can light be thought of?
waves of energy or packets (particles) of energy. Photons.
what are the shapes of an energy wave called?
peaks and troughs and wavelengths
what is the range of all possible frequencies called?
Electromagnetic spectrum
def’n wavelength
the distance btwn adjacent peaks of an oscillating field
def’n frequency
the # of wavelengths that pass a particular point in space over a period of time
there is an inverse relationship between wavelength and _____
frequency
longwavelength=freq=energy
shortwavelength=freq=energy
low freq low energy
high freq high energy
what do you have to multiply nm by to get m?
10^9
quantum de’fn
a fixed amount
c=λν definition
c= speed of light λ= lamda, wavelength ν= nu, frequency
E=hv
energy of a photon
E= energy
h= planck’s constant
ν= nu, frequency
monochromatic
emit a single wavelength of light
polychromatic
produce many wavelengths of light
when do you use a line spectrum?
for atoms and molecules. you cannot observe a continuous spectrum
1/λ=(Rh)((1/n1^2)-(1/n2^2))
which constants represent positive intigers?
n1 and n2
what was the assumed movement of electrons for the bohr model?
they move in a circular orbit around the nucleus
another word for orbits (in regard to electron movements)
radii
name the state of n=1
name the state of n=>1
ground state
excited state
what does Bohr’s model calculate?
the orbit energy levels
in the Bohr’s model, how is energy emitted or absorbed by the electron as it changes from one energy state to another?
occurs by absorbing or emitting a photon
En=(-2.178x10^-18J)(1//n^2)
what does this represent?
Bohr model, energy change between one energy state and another
what is the charge of the nucleus for the Bohr model?
positive
what charge are the electrons for the Bohr’s models?
negative
photons are __________ particles of light
quantized
