In: Physics
A cobalt ion with a single electron (denoted Co26+) is in an excited state with radius the same as that of the ground state of hydrogen.
(a) What is n for the Co26+ ion?
(b) How much energy in eV is needed to ionize the ion from this
excited state?
eV
a)
Atomic number of Cobalt
Let there be protons in the nucleus and a single electron orbiting the nucleus.
Radius of circular orbit is .
Using the Bohr model, radius of the n th state is
Radius of the ground state of hydrogen atom is ( n=1 and Z =1)
Hence
For the above Cobalt ion, radius = radius of ground state hydrogen atom.
that is
b)
Energy of an electron in the n th level is
Energy needed to ionize the ion from this excited state is