Emission Spectra and Bohr Model Flashcards
When current is passed through a gas at low pressure the atoms of the gas change from being in a … energy state to an … energy state
ground; excited
atoms can go back to a ground energy state by … some of the excess energy in the form of …
releasing; light
when current is passed through hydrogen gas it gives off a characteristic … light
pinkish
if this light is passed through a … it can be separated into the different … of light that make it up
prism; frequencies
the resulting bands of light are known as …
hydrogen’s line emission spectrum
when atoms become “excited”:
electrons in the atoms move to a higher energy level
atoms return to its ground state when…
the electron falls back down to a lower energy level
the electron releases energy in the form of light in order to…
reach the lower energy level
when an electron returns to a lower energy level they release…
photons of light
elements only release photons of…
certain colors
photons carry a specific amount of energy
(Ephoton= hv)
each element only releases specific amounts of…
energy
the amount of energy released is … to the energy difference between the two energy levels
equal
the energy … between the atoms’ energy states are fixed
differences
… of each element can only exist at very specific energy states
electrons
because only certain amounts of energy are being released, (certain frequencies of light) Neils Bohr hypothesized that electrons in the atoms could only exist at specific … distances or … from the …
distances; energy levels; nucleus
quantized-electrons must…
absorb or release a specific amount of energy to love between them
,,, can’t have any amount of energy they want. there are only certain amounts of … they can have
electrons; energy
bohr model, aka
planetary model
… discovered the positively charged nucleus
Rutherford
electrons … the nucleus at … energy levels
orbiting; specific
energy levels … away from the … at specific energy levels
furthest; nucleus
each energy level can only hold a specific … of …
number; electrons
Bohr model of Hydrogen fit the … of hydrogen perfectly but …
line emission spectra; it didn’t fit the other elements very well
