What type of symmetry is associated with I (1) a point charge (2) a dipole

What type of hybrid orbitals are associated with a) Ni in (Ni(CN)_4]^2- b) C atom in CO_3^2- .

What do you mean by symmetry? How many kinds of symimetry is found in. animals? Write atleast one character and give one eg : from each type of symmetry.

A thin metallic spherical shell contains a charge Q on its surface. A point charge q_1 , is placed at the center of the shell, and another charge q_2 is placed outside the shell. All the three charges are positive. Then the force on charge q, is

An electron revolving round the nucleus acts as a magnetic dipole. A charge 2mC Is moving through a circular path of radius 0.15m with frequency 100Hz.Find the magnetic moment associated with the charge. path.

i. The energy associated with the first-orbit in the hydrogen atom is -2.18 xx 10^(-18)J atom^(-1) . What is the energy associated with the fifth orbit?