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kraphysics
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I am in grade 12 physics and we're currently doing atomic physics. So far I understand that when electrons get excited, they move on to higher energy levels by absorbing photons. Also I understand that when an electron moves from a higher energy level to a lower one, photons are emitted. But my textbook mentions that the ionization energy of helium is simply the energy of the first energy level, En 1 = -2.18 * 10^-18. I don't understand why the ionization energy is En 1? Could someone explain? Thanks
This is not a homework question. I am just curious.
This is not a homework question. I am just curious.
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