(i) Why is +2 oxidation state of Mn (25) quite stable, while the same is not true for iron (26)? (ii) What is meant by

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Q 3112691530.     (i) Why is +2 oxidation state of Mn (25) quite
stable, while the same is not true for iron (26)?
(ii) What is meant by dual nature of electrons?
Calculate the energy and wavelength of the
photon emitted by hydrogen atom when
electron makes a transition from n = 2 to
n = 1. Given that the ionisation potential is
`13.6 e V . (1 e V = 1.6 xx 10^(-19) J)`

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(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

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