Assertion : Actinoids form relatively less stable complexes as compared to lanthanoids. Reason : Actinoids can utilise their 5f orbitals along with 6d orbitals in bonding but lanthanoids do not use their 4f orbital for bonding.

General electronic configuration of actionoids is [Rn] 5f^(1-14) 6d^(0-1) 7s^2 . Which of the following actionoids have one electron in 6d orbital ?

Assertion : Lanthanoids show a limited number of oxidation states whereas actinoids show a large number of oxidation states. Reason : Energy gap between 4f, 5d and 6s subshells is small whereas that between 5f. 6d and 7s subshells is large.

Using s, p, d and f notations, describe the orbital with the quantum number. n = 5 , l = 3

Using s, p, d and f notations, describe the orbital with the quantum number. n = 5 , l = 2

Using s, p, d and f notations, describe the orbital with the quantum number. n = 4 , l = 0

An electron is circulating around the nucleus of a hydrogen ato in a circular orbit of radius 5.3 cxx10^-11 m. Calculate the electric potential energy of the atom in eV. What would be the electric potential due to a helium nucleus at the same radius. Given, that (4piepsilon_0)^-1 = 9xx10^9 m F^-1 and e = 1.6 xx 10^-19 C .