(a) What happens when `K_2Cr_2O_7` is heated strongly? (b) Transition elements form complexes easily. Justify. (c) Why 5d transition series elements have higher ionization enthalpies than 4d transition series elements ?

The 3d-transition series contains elements having atomic numbers ranging from

First IE of 5d seties element are higher than those of 3d and 4d series elements. This is due to:

Why is enthalpy of atomisation is the lowest for Zn in 3d series of transition elements ?

Which elements have low ionisation enthalpy as compare to their neighbour element in first transition series?

Answer the following questions (i) Which element of the first transition series has highest second ionisation enthalpy? (ii) Which element of the first transition series has highest third ionisation enthalpy? (iii) Which element of the first transition series has lowest enthalpy of atomisation? (b) Identify the metal and justify your answer. (i) Carbonyl M(CO)_(5) (ii) MO_(3)F

Atomic number of the element having ns^1 configuration and belonging to 3d transition series would be________.