3.5 Energy levels and spectra + helium things Flashcards
The wavelength of the light photons increases across…
The continuous spectrum from deep violet at less than 400nm and to deep red at about 650nm
What can we see if we use a tube of glowing gas rather than a filament lamp
We see a spectrum of discrete lines of different colours
What are characteristics of atoms of a certain element
The lines on a line spectrum of that element
What creates discrete spectrum
Gas tube of glowing gas
What can we identify by measuring the wavelengths of a line spectrum
The element that produced the light
Why do no atoms produce the same pattern of wavelengths
The energy levels of each atom are unique to that atom so the photons emitted are a characteristic of that atom
What is each line in a line spectrum due to
Light of a certain colour and therefore a certain wavelength
What photons are each individual line made up of
All the photons have the same energy which is different from the energy of the photons that produce any other line
When is a photon omitted
When an atom deexcites due to one of its electrons moving to an inner shell
If an electron moves from energy level one to a lower energy level two what is the energy of the emitted photon
Hf=e1-e2
what creates a continues light spectrum
using the filament lamp as a light source
