Assertion `(A): wedge_(m(H^(o+)))` and `wedge_(m(overset(c)(O)H))` ions are very much higher than those of other ions.
Reason `(R): `It is due to proton jump from one water molecule to another resulting in a more rapid transfer of positive charge form one region to another.

Assertion (A): Among the two O-H bonds in H_(2)O molecule, the energy required to break the first O-H bond and the other O-H bond is the same. Reason (R) This is because the electronic environment around oxygen is the same even after brekage of one O-H bond.

Assertion (A): Among the two O-H bonds in H_(2)O molecule, the energy required to break the first O-H bond and the other O-H bond is the same. Reason (R) This is because the electronic environment around oxygen is the same even after brekage of one O-H bond.

Assertion (A) : (H_(2)+O_(2)) fuel cell gives a constant voltages throughout its life. Reason (R): In this fuel cell, H_(2) reacts with overset(-)(OH) ions, yet the over all [overset(c-)(O)H] does not change.

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R: Assertion A: The H-O-H bond angle in water molecule is 104.5^(@) Reason R: The lone pair - lone pair repulsion of electrons is higher than the bond pair - bond pair repulsion. In the light of the above statements, choose the correct answer from the options given below:

Atoms more complicated than hydrogen have more than one proton in their nucleus. Let Z stands for the number of protons in a nucleus. Also imagine that an atom loses all but one of its electrons so that it changes into a positively charged ion with just one electron. Bohr.s formula for the energy levels of the hydrogen atom can easily be changed to apply to such ions. It becomes E_m = (-Z^2 e^4 m_e)/(8 epsi_0^2 h^2 n^2) , where m= mass of electron , e= change of electron, n = orbit number. The ionization potential of Het in ground state is