Asubstance has a triple point at −24.5 ∘c and 225 mmhg. what is most likely to happen to a solid sample of the substance as it is warmed from −35 ∘c to 5 ∘c at a pressure of 210 mmhg?

nothing (the solid will remain as a solid).
the solid will sublime into a gas.
the solid will melt into a liquid.

Solid will sublime into a gas.

Explanation:

Triple point is a temperature where the three states of a substance coexist.

If the pressure is lower than the triple point, the substance does not exist as a liquid, so it is impossible that solid melts, or that the solid remains as a solid.

Liquid state is not stable.

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.