Suppose hydrogen atoms absorb energy so that electrons are excited to the n (a)

Question

Suppose hydrogen atoms absorb energy so that electrons are excited to the n (a) n 7 to n =1 (b) n 7 to n = 6 (c) n = 2 to n =1 Enter the letter (a, b, or c) for each Which transition produces a photon with the smallest energy? the highest frequency? the shortest wavelength? 7 energy level. Electrons then undergo these transitions, among others Suppose you live in a ditferent universe where a ditferent set of quantum numbers is required to describe the atoms of that unverse. These quantum numbers have the following rules: N, principal1, 2, 3, L' orbital -N M, magnetic 10,-1 How many orbitals are there altogether in the first three electron shells orbitals A possible excited state for the H atom has an electron in the Sd orbital. List all possible sets of quantum numbers n, E, and me for this electron. (Select all that apply) On- 5, 2, m -2 How many subshells that have a principal quantum number n- 4 exist in the electronic shell?

Explanation / Answer

1) Transition with smallest energy is (c)

transition with highest frequency is (a)

transition with shortest wavelength is (a)

2) for N =1 we have 3 shells i.e M = -1,0,1 , similarly for N = 2 , 3 we have same shubshells

each subshell can have 2e- maximum. Thus total 9 subshells can take 18 electrons maximum. Thats answer

3) electron in 5d orbital has n = 5 , l = 2 , ml = -2

n = 5 ,l = 2 , ml = 1

n = 5 , l = 2 , ml = 2

nn = 5 , l =2 , ml = -1

4) for n = 4 , number of subshells = n^ 2 = 4^2 = 16

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