No. Oxygen isn't even a metal.
Alkaline earth metals are the elements of the second column of the periodic table.
As such, all objects free fall at the same rate regardless of their mass. Because the 9.8 N/kg gravitational field at Earth's surface causes a 9.8 m/s/s acceleration of any object placed there, we often call this ratio the acceleration of gravity.
The time is the same it just feels faster because your literally falling from the sky and since your scared it will either go by slower or faster
Assuming that the solution is simply an aqueous solution
so that it is purely made of NaClO4 (the solute) and water (the solvent), then
I believe the dissolved species would only be the ions of NaClO4, these are:
Na+
ClO4 -
1.07 mol would be your answer