In another experiment involving the above reaction at 1,000c, the equilibrium concentrations were found to be: H2(g)=2.0 moles per liter
H2O(g)=4.0 moles per liter
CO2(g)=5.0 moles per liter
CO(g)=4.0 moles per liter
What is the equilibrium constant, Keq, for this reaction?

there is none because earth is stationary and flat.

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.