How are theoretical predictions useful?

Geiger - Marsden's experiment confirmed the theoretical predictions of………

Theoretical probability

Though N-F in NF_(3) is a polar bond, the experimental bond length is greater than the theoretically predicted value. Explain.

Assertion : Magnetic moment values of actinides are lesser than the theoretically predicted values. Reason : Actinide elements are strongly paramagnetic.

Assertion : Magnetic moment values of actinides are lesser than the theoretically predicted values. Reason : Actinide elements are strongly paramagnetic.

Theoretical efficiency of fuel is