Please help me solve​

As you move from right to left on the periodic table the atomic radius fill in the blank

Express the following number in scientific notation. 0.026890 =

Compare the equilibrium constants for the systems shown in the table. which favors products the most? which favors products the least? rank these systems in order from most to least in terms of favoring products rather than reactants. d > b > a > c c > a > b > d b > c > d > a a > d > c > b