The number of unpaired electrons in $[Co(H_2O)_6]^{2+}$ is ________.
The value of 'n' in \([ \text{P(O}_3\text{)}_4 ]^{6-}\) is ............
The total number of all possible isomers of \( [\text{Co}( \text{H}_2\text{NCH}_2\text{CH}_2\text{NH}_2)_2 ]^{2+} \) and \( [\text{Co}( \text{H}_2\text{NCH}_2\text{CH}_2\text{NH}_2)_3 ]^{3+} \) together is ............
The plot showing the magnetic behavior of oxy- (solid line) and deoxy-haemoglobin (dashed line) is