1) In the spectrum of hydrogen atom, the series which falls in ultraviolet is a) Balmer series b) Lyman series c) Brackett series d) Paschen series 2) For a second line in Balmer series of the hydrogen atom, calculate the wavelength.  a) 9.18 x 10⁻⁷ m b) 6.89 x 10⁻⁷ m c) 6.17 x 10⁻⁷ m d) 7.39 x 10⁻⁷ m 3) Light emitted by a mercury vapor lamp has a wavelength of 690 nm. Calculate the frequency of this radiation. a) 3.00 x 10⁸ s⁻¹ b) 5.89 x 10⁸ s⁻¹ c) 4.35 x 10⁸ s⁻¹  d) 17.67 x 10⁸ s⁻¹ 4) A spectrum containing of a series of specific wavelength is a a) line spectrum b) visible spectrum c) continuous spectrum d) Balmer spectrum 5) What is the possible set quantum number for an electron in the outermost subshell of Neon atom at ground state if proton number of Ne is 10 a) (1,0,1, +1/2) b) (2, 0, 1,-1/2) c) (2,1,-1,-1/2) d) (2,1,2,+1/2) 6) Which of the quantum numbers defines the orientation of the orbital? a) s b) l c) m d) n 7) Which of the principle states the electrons fill in the orbitals of lower energy first? a) Aufbau b) Hund c) Pauli d) Paschen 8) When an electron drops from higher energy level to a lower energy level, then a) the energy is absorbed b) the energy is released c) the nuclear charge increases d) the nuclear charge decreases 9) The electronic configuration of a cation M⁵⁺ is 1s²2s²2p⁶3s²3p⁶. What would be the electronic configuration of M. a) 1s²2s²2p⁶3s²3p¹ b) 1s²2s²2p⁶3s²3p⁶3p⁵ c) 1s²2s²2p⁶3s²3p⁶3d⁵ d) 1s²2s²2p⁶3s²3p⁶3d³4s² 10) An atom X has a proton number of 12. What is the electronic configuration of ion X²⁺ ? a) 1s²2s²2p⁶3s¹ b) 1s²2s²2p⁶ c) 1s²2s²2p⁶3s² d) 1s²2s²2p⁵

Chapter 2: Atomic Structure

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