Examples for atomic physics
a.) What is the energy of a photon emitted as an electron moves from the n = 5 to the n = 2 level in hydrogen?
The energy of each level goes as (13.6 eV)/n2. The difference between the n = 5 and n = 2 values is the
energy of the photon's energy.
b.) What is the wavelength of such a photon?
Change the energy to Joules, then use E = hf to get the frequency. Then get the wavelength. OR use the formula:
c.) What is the energy of a photon in the same transition is carbon (Z=6)?
The energy scales as Z2, so multiply the answer in part a by 36.
a.) How many electrons are in an atom specified by 1s2,2s2,2p6,3s2,3p4?
Count up the numbers in the superscripts.
b.) Write the spectroscopic notation for a neutral gold (Au) atom? See periodic table.
See that a gold atom should have 79 electrons by looking at the periodic table. Then count up:
Atomic physics' index