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The energies, E, for the first few states of an unknown element are shown here in arbitrary units. n 1 2 3 4 E -63 | -27 -12
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Answer #1

A)

63 is energy difference between n=1 and n=infinity

So, electron will be promoted to n=infinity

Answer: ionised

B)

51 is energy difference between n=1 to n=3

So, this photon will move electron to 3rd energy state

Answer: n-=1 to n=3

C)

47 is not an energy difference in the given atom

So, this photon is not absorbed

Answer: Not absorbed

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