Maximum oxdation number of under lined atom is shown in:

In which of the following the oxidation number of the underlined atom is maximum ?

Oxdation number of Fe in K_3[Fe(CN)_6] is:

Maximum number of atoms are present in

Maximum number of nitrogen atoms occur in

Maximum number of nitrogen atoms occur in

Maximum number of nitrogen atoms occur in

Each hydrogen atom is excited by giving 10.2eV. The maximum number of spectral lines in the emission is equal to

What would be the maximum number of emission lines for atomic hydrogen that you would expert to see with the naked eye if the only electronic energy involved are those as shown in figure ?