2. You own a professional carpet cleaning business and need to restock your cleaning supplies. You're not sure whether you should continue buying the same cleaner as
before or if you should try something new. (Don't worry about prices). Design an
experiment to determine which cleaner works best.
a. What variables would you need to control in your experiment?
b. Which variable will you change to see how it affects the outcome?
C. What is the measurable data point for this experiment?
d. What would the procedure be for your experiment?

we can conclude that the melting point of table salt is above room temperature (it's actually 801 deg c). the melting point of mercury must be below room temperature (- 39 deg c).

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.