Which of the following metals does not react with a solution of copper sulphate?

How do you determine the chemical reactivity of a compound? Provide an example.

The correct order of increasing metallic character of $Na$,$Be$,$P$,$Mg$ and $Si$ is:

The increasing order of reactivity among group $1$ elements is $Li < Na < K < Rb < Cs$ whereas that among group $17$ elements is $F > Cl > Br > I$. Explain.

Fluorine is a stronger oxidising agent than chlorine in aqueous solution. This is attributed to many factors except

Observe the following data ($ \Delta_i H_1, \Delta_i H_2 $ and $ \Delta_{eg} H $ represent the first,second ionisation enthalpies and electron gain enthalpy respectively).

Element	$ \Delta_i H_1 $ $( kJ \ mol^{-1} )$	$ \Delta_i H_2 $ $( kJ \ mol^{-1} )$	$ \Delta_{eg} H $ $( kJ \ mol^{-1} )$
$ I $	$ 520 $	$ 7300 $	$ -60 $
$ I.I $	$ 490 $	$ 3051 $	$ -48 $
$ III $	$ 1681 $	$ 3374 $	$ -328 $
$ IV $	$ 2372 $	$ 5251 $	$ +48 $

Using the data,identify the most reactive metal.