Concept Used:
Number of electrons = Total electrons of neutral species ± charge
(a) H2+
Each hydrogen atom has 1 electron.
Total electrons in H2 = 2
Since it has +1 charge:
Number of electrons = 2 − 1 = 1
(b) H2
Each hydrogen atom has 1 electron.
Number of electrons = 2 × 1 = 2
(c) O2+
Atomic number of oxygen = 8
Electrons in neutral oxygen atom = 8
Since it has +2 charge:
Number of electrons = 8 − 2 = 6
Final Answer:
H2+ : 1 electron
H2 : 2 electrons
O2+ : 6 electrons
Considering Bohr’s atomic model for hydrogen atom :
(A) the energy of H atom in ground state is same as energy of He+ ion in its first excited state.
(B) the energy of H atom in ground state is same as that for Li++ ion in its second excited state.
(C) the energy of H atom in its ground state is same as that of He+ ion for its ground state.
(D) the energy of He+ ion in its first excited state is same as that for Li++ ion in its ground state.