The pair of species with the same bond order is
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When the azimuthal quantum number has the value of 2, the number of orbitals possible are
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Bond order of 1.5 is shown by
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If the 1st ionization energy of H atom is 13.6 eV, then the 2nd ionization energy of He atom is
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The frequency of light emitted for the transition n = 4 to n = 2 of He+ is equal to the transition in H atom corresponding to which of the following
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Uncertainty in the position of an electron (mass = 9.1 × 10–31 kg) moving with a velocity 300 ms–1, accurate upto 0.001%, will be (h = 6.63 × 10–34 Js)
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The de Broglie wavelength of a tennis ball of mass 60 g moving with a velocity of 10 metres per second is approximately
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Mg2+ is isoelectronic with
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The wave number of the spectral line in the emission spectrum of hydrogen will equal to times the Rydberg's constant if the electron jumps from ______.
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Ionisation energy of He+ is 19.6 ´ 10–18 J atom–1. The energy of the first stationary state (n = 1) of Li2+ is
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