Suppose an electron from the 4 th orbit of b 4 ion

4. Suppose an electron from the 4
th
orbit of B
4+
ion absorbs a photon and jumps to the 10
th
orbit, what is the
energy of the incident photon?
(a) 17.85 eV (b)  0.062 eV (c) 13.6
(d) 0.714 eV (e)  17.85 eV (f) 0.052 eV
eV
5. The energy of an electron in a hydrogen-like atom depends on which of the following?
l and m
l
6. Which set of the following orbitals are degenerate in a hydrogen atom?
, 4 f
7. Circle the sub shells which cannot exist in an atom?
8. Identify correct order for the penetration of electrons in different orbitals?
(a) s > p < d> f (b) f > d > p > s (c) p > f > d > g (d) s > p> d > f
10. .Which of the following orbitals has minimum number of angular nodes?

11. Which of the following elements, valence electrons, has the lowest Z
eff
(Clementi)?
(e)
15
P