Bond order of Ne₂ is zero.

The highest occupied molecular orbital (HOMO) of F₂ is $\sigma$-type.

Bond energy of $O_2^{+}$ is smaller than the bond energy of O₂.

Bond length of Li₂ is larger than the bond length of B₂.

La³⁺, Ce⁴⁺

Yb²⁺, Lu³⁺

La²⁺, Ce³⁺

Yb³⁺, Lu²⁺

C–X bond length in P, Q and R follows the order Q > R > P.

C–X bond enthalpy in P, Q and R follows the order R > P > Q.

Relative reactivity toward S_N2 reaction in P, Q and R follows the order P > R > Q.

pK_a value of the conjugate acids of the leaving groups in P, Q and R follows the order R > Q > P.