Answer:
Sulfur
Explanation:
Sulfur has 16 valence electrons, as shown in the diagram.
To be able to write correctly the equilibrium expression of a reaction, we need to know the balanced reaction and the phases of the substances in the reaction. When substances are solid, pure liquid they are not included in the expression. We do as follows:
<span>4KO2(s) + 2H2O(g) = 4KOH(s) + 3O2(g)
K = [O2]^3 / [H2O]^2</span>
<span>the following element that is most reactive </span>would be Fluorine
C. Spacecraft are built to be airtight.
