1. What is the de Broglie wavelength in cm of... hummingbird flying at 1.20 x 10

1. What is the de Broglie wavelength in cm of a 12.4g
hummingbird flying at 1.20 x 102 mph (1 mile = 1.61 km)?
2. The first line of the Balmer series in the atomic
spectrum of hydrogen occurs at a wavelength of 656.3 nm.
What is the energy difference between the two energy levels
involved in the emission that results in this spectral
Which sets of quantum numbers are unacceptable:
(1, 0, 1/2, +1/2 )
( 3, 0, 0, +1/2 )
( 2, 2, 1, +1/2 )
( 4, 3, -2, +1/2 )
( 3, 2, 1, 1 )
4. A photon has a frequency of 6.0 x 104 Hz. Convert this
frequency into a wavelength.
5. Cesium metal is frequently used in photoelectric cells
because the amount of energy necessary to eject electrons
from a cesium surface is relatively small – only 206.5
kj/mol. What wavelength of light in nm does this correspond
6. Give the allowable combinations of quantum numbers for
each of the following electrons:
a) a 4s electron
b) a 3p electron
c) a 5f electron
d)a 5d electron
7. Give the expected ground-state electron configurations
for the following elements:
a) Ti
b) Ru
c) Sn
8. Given the subshells 1s, 2s, 2p, 3s, 3 and 3d, identify
those that meet the following descriptions:
a) has l = 2
b) can have ml = -1
c) Is empty in a nitrogen atom
d) is full in a carbon atom
e) contains the outermost electrons in a beryllium atom
f) can contain two electrons, both with spin ms = +1/2, in
a single orbital
9. A photon produced by an x-ray machine has an energy of
4.70 x 10-16 J.
a) what is the frequency of the photon?
b) what is the wavelength of radiation of frequency a)?
c) what is the velocity of an electron with a de Broglie
wavelength equal to b)?
10. How many photons at 660 nm must be absorbed to melt 5.0
x 102 g of ice? (it takes 334 J to melt one gram of ice at