In the series Sc (Z = 21) to Zn (Z = 30), the enthalpy of atomisation of zinc is the lowest, i.e., `126 kJ moI^-1`. Why?

In the series Sc(Z = 21) to Zn(Z =30), the enthalpy of atomisation of zinc is lowest i.e., 126 kJ mol^-1 .. Why ?

in 3d-series,zinc (Z=30) has highest enthalpy of atomisation.

Why do the transition elements have higher enthalpies of atomisation? In 3d series (Sc to Zn), which element has the lowest enthalpy of atomisation and why?

At 25^(@)C , when 1 mole of MgSO_(4) was dissolved in water, the heat evolved was found to be 91.2 kJ. One mole of MgSO_(4) . 7H_(2)O on dissolution gives a solution of the same composition accompanied by an absorption of 13.8 kJ. The enthalpy of hydration, i.e., DeltaH_(h) for the reaction MgSO_(4)(s) + 7H_(2)O(l)rarrMgSO_(4) . 7H_(2)O(s) :

Scandium (z = 21) is a transition element but zinc (z = 30) is not. Explain.

Why do transition elements show variable oxidation states ? Name the element showing maximum number of oxidation states among the first series of transition metals from Sc (Z = 21) to Zn (Z= 30).

The amplifiers X, Y and Z are connected in series. If the voltage gains of X, Y and Z are 10, 20 and 30, respectively and the input signal is 1 mV peak value, then what is the output signal voltage (peak value) if d.c. supply voltage is 5V?

The amplifiers X, Y and Z are connected in series. If the voltage gains of X, Y and Z are 10, 20 and 30, respectively and the input signal is 1 mV peak value, then what is the output signal voltage (peak value) if d.c. supply voltage is 10V?

Let P point denoting a complex number z on the complex plane. i.e. z=Re(z)+i Im(z)," where "i=sqrt(-1) if Re(z)=xand Im (z)=y,then z=x+iy Number of integral solutions satisfying the eniquality |Re(z)|+|Im(z)|lt21,.is