Assertion: neon's electron | /r/HasProperty | n = 2 state
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Source sentences:
text: As shown in the accompanying energy-level diagram, these collisions excite helium atoms from the ground state to higher energy excited states, among them the 23S 1 and 21S 0 (LS, or Russell–Saunder, coupling, front number 2 indicates that an excited electron is n = 2 state) are long-lived metastable states.