The energy of `sigma_(2x)`, is greater than that of `sigma_(1s)^**` orbital because

The energy of sigma_(2s) , is greater than that of sigma_(1s)^** orbital because

The energy of sigma 2s is greater than sigma^("*")1s Is orbital because

The sigma_(2s) orbital has a higher energy than sigma_(1s)^(**) orbital, sigma(_2s) orbital is bonding while sigma_(1s)^(**) orbital is antibonding because :

The wave functions of Is-orbitals of two hydrogen atoms are Psi_(A) " and " Psi _(B) . Psi_(A) " and " Psi_(B) are linearly combine to form two molecular orbitals ( sigma " and " sigma^(**)) . Which of the following statements are correct ? I . sigma^(**) equal to (Psi_(A) - Psi_(B)) . In sigma - orbital, one nodal plance is present in between two nuclei . III. The energy of sigma -orbital is lower then the energy of sigma -orbital .

Assertion :- The first ionization energy of Be is greater than that of B 2p- orbital is lower in energy when 2s- orbital.

Comprehension given below is followed by some multiple choice question, Each question has one correct options. Choose the correct option. Molecular orbitals are formed by the overlap of atomic orbitals. Two atomic orbitals combine to form two molecular orbitals called bonding molecular orbital (BMO) and anti-bonding molecular orbital (ABMO). Energy of anti-bonding orbital is raised above the parent atomic orbitals that have combined and hte energy of the bonding orbital is lowered than the parent atomic orbitals. energies of various molecular orbitals for elements hydrogen to nitrogen increase in the order sigma1s lt sigma^(star)1s lt sigma^(star)2s lt ((pi2p_(x))=(pi2p_(y))) lt sigma2p_(z) lt (pi^(star)2p_(x) = pi^(star)2p_(y)) lt sigma^(star)2p_(z) and For oxygen and fluorine order of enregy of molecules orbitals is given below. sigma1s lt sigma^(star)1s lt sigma2s lt sigma^(star)2s lt sigmap_(z) lt (pi2p_(x) ~~ pi2p_(y)) lt (pi^(star)2p_(x)~~ pi^(star)2py) lt sigma^(star)2p_(z) Different atomic orbitalsof one atom combine with those atoms orbitals of the second atom which have comparable energies and proper orientation. Further, if the overlapping is head on, the molecular orbital is called sigma, sigma andif the overlap is lateral, the molecular orbital is called pi, pi . The molecular orbitals are filled with electrons according to the same rules as followed for filling of atomic orbitals. However, the order for filling is not the same for all molecules or their ions. Bond order is one of the most important parameters to compare the strength of bonds. 67) Which of the following pair is expected to have the same bond order?