In the series $Sc (Z = 21)$ to $Zn (Z = 30)$,the enthalpy of atomization of . . . . . . is the lowest.

Which of the following is arranged in order of increasing melting point?

The maximum melting point $(m.p.)$ of the $1^{st}$ transition series and the minimum melting point $(m.p.)$ of the $2^{nd}$ transition series are obtained with:

What is the correct order of the following elements with respect to their density?

Which of the following transition metals has the highest melting point?

Which of the following elements has the highest density?