During the recrystallization of a solid, the sample is dissolved in hot solvent then filtered while hot. the filtrate is allowed to cool and the mixture is filtered a second time. what effect will result if the filtrate solution is cooled too rapidly? small impure crystals will form. small pure crystals will form. the maximum amount of the compound as a purified solid will be obtained. large impure crystals will form.

If the filtrate solution is cooled too rapidly, Small pure crystals will form.

Explanation:

The crystals form by two processes, nucleation and particle growth. Thus the size of the crystals is determined by the predominance between one or the other. In order to obtain the lower number of nucleus  and the larger crystals it is necessary to cool the solution slowly. If the solution  is cooled too rapidly there is no time to the particles growth and the result will be small crystals. But also, a fast cooling avoid the impurities in the crystals.

since electrons are negative the answer is neagtaive

the seeing the electronic configuration we can say that the element is fluorine.

fluorine is the most electronegative element in the periodic table.

but by only seeing the configuration we cannot say about its reactivity because we don't know if its configuration after excitation or by addition of electrons.

but if not then, it is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. as the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine.