bohr's model of hydrogen atom Flashcards
for exam 1
what is the hypothesis of bohr’s model
it is a model to explain how the structure of the atom changes when it undergoes energy transitions
what was wrong with rutherford’s model that made bohr make his own model
rutherford’s model didn’t account for structural changes when atoms lose or gain energy
what are the limitations of bohr’s model
violates heisburg’s uncertanty principal; lacks reliability regarding larger atoms; fails to explain zeeman effect; fails to explain stark effect
what is major idea of bohr’s model
The energy of the atom is quantized — and that the amount of energy in the atom was related to the electron’s position in the atom
what does quantized mean
an atom can only have very specific amounts of energy
bohr coins “stationary states”, what does this mean
The electrons travel in orbits that are at a fixed distance from the nucleus
how many stationary states are there, where does it start counting from
1-7
how do the stationary states relate to energy level
the energy of the electron is proportional to the distance the orbit was from the nucleus
– the further from the nucleus, the greater the energy
what happens during absorption for electrons in bohr’s model
an electron will absorb energy in the form of photons to get excited to a higher energy level
ground vs excited
ground state is lowest energy, most stable arrangement. excited state is higher energy
what happens to stability and energy level as electrons orbit further from nucleus
further from nucleus = higher energy, lower stability
what happens to stability and energy level as electrons orbit closer to nucleus
closer to nucleus = lower energy, higher stability
what are strengths of bohr’s model
it accounts for atomic structural changes
when an electron changes states, what is emitted
radiation/energy in form of photon
if an electron moves to n=1, from which position n will release the longest wavelength?
n = 2, because longest wavelength = lower energy, and smaller jumps release less energy
