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Explain excitation/ionisation
Electrons gain energy by absorbing a photon and lose energy by releasing photons.
The ground state is when the electrons are in their lowest energy state.
Excitation happens when the electrons move to a higher energy level within the atom.
Ionisation is when electrons get enough energy to leave the atom altogether.
What is an emission spectrum?
A bright spectrum seen when photons are emitted from atoms as electrons fall from a higher energy state to a lower energy state.
What is an absorption spectrum?
A spectrum of dark lines seen on a coloured background produced when a gas absorbs specific electrons which corresponds to energy transitions and leaves out all other photons that can't be absorbed.
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