Question

2. What is the energy needed to raise an electron in energy level? the hydrogen atom from the second energy level to the third 2. α) 1.52 x 104J b) 3.63 x 10-19 2.18x 10-191 d) 4.48 x 10-19 3.03 x 10-19 Which quantum number determines the subsbell occupied by an clectron (a p. d. f.etc. a) e b) 4. The value of E that is related to the following orbital is: a) o 12 3) 4 5. The correct electron configuration for nitrogen is a) b) Is22s2 2p6 3s2 3p2 Is2 2s2 2p6 2d4 d) Is 2s2 3s2 4s1 e) Is2 1p 6. The electron configuration of the indicated atom in the ground state is correctly written for which atom? a)Ga b) Ni LAr] 3d12 4s2 [Ar] 3d10 [Ar] 3s2 3p [Ar] 3d10 4s c) Ni d)) Cu 7. Which of the following sets of quantum numbers is possible for a 3d electron? a) 3.1-3.we,--2, o4°+ # 8. Which of the following distributions of electrons is correct for three electrons in p-subshell? b) c) d) 1

Answer 1

To calculate the energy of Hatom system the following formula can be used: - E = -2.178 times 10^-8/n^2 J or, delta E = -2.178 times 10^-8 [1/n_f^2 - 1/n_i^2] here, n_f = 3, n_i = 2 or, delta E = -2.178 times 10^-8 [1/3^2 - 1/2^2] or, delta E = 3.025 times 10^-19 J or, delta E tidleequal 3.03 times 10^-19 J. Correct choice is principle quantum no. (n) The given orbital is P. so, l = 1 for P orbital nitrogen electronic configuration: - 1S^2 2S^2 2P^3 Cu rightarrow [Ar]3d^10 4S^2 For 3d e^(-) possible sets of quantum no. Is: n = 3, l = 2, m_l = -2, m_s = + 1/2 correct distribution is