At 1990 K and 1 atm pressure, there are equal number of Cl₂, molecules and Cl atoms in the reaction mixture. The value of K_p for the reaction Cl_{2 (g)} $\rightleftharpoons$ 2Cl_(g) under the above conditions is x $\times$ 10^-1.
The value of x is _______. (Rounded off to the nearest integer)