Whether molecular ion `HeH^(Θ)` exist or not? Explain.

Say whether molecular force is a saturated force or not.

Assertion: - In mass spectrometry, the molecular ion peak gives the molecular mass of the compound. Reason :-The molecular mass of the molecular ion is the same as that of the compound taken.

Mercurous ion exists as Hg_(2)^(2+) . Explain.

The HF_(2)^(Θ) ion solid state and in liquid HF but not in the dilute aqueous solution HF_(2)^(Θ) exists in solid state and in liquid HF because HF_(2)^(Θ) ions are held together by .

The HF_(2)^(Θ) ion solid state and in liquid HF but not in the dilute aqueous solution HF_(2)^(Θ) exists in solid state and in liquid HF because HF_(2)^(Θ) ions are held together by .

Which of the follwing molecular species does not exist?