Which of these transitions are possible for the electronic absorption of an atom

Question

Which of these transitions are possible for the electronic absorption of an atom or molecule? A 1s electron in hydrogen is promoted to the 2p orbital b A 1s electron in hydrogen is promoted to the 3d orbital A 2s electron in hydrogen is promoted to the 3d orbital An electron with the quantum numbers (n = 2, I = 1, ml = 1 and ms = +1/2 in hydrogen is demoted (e.g., via the emission of a photon) to a wave function with the quantum numbers (n = 1, I= 0, ml = 0 and ms = +1/2. An electron with the quantum numbers (n = 2,1 = 1, jnl = 1 and ms = +1/2 in hydrogen is demoted (e.g., via the emission of a photon) to a wave function with the quantum numbers (n = 1,1 = 0. ml = 0 and ms = +1/2.

Explanation / Answer

absorption means atom or molecule gains energy and transition from lower energy level to higher energy level

a. A 1s electron in hydrogen is promoted to the 2p orbital           is correct answer

because the energy difference between immediate levels is lower ( 1s & 2p) compare to farthest orbital (1s & 3d)

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