The lithium ion Li²* is a hydrogen-like ion because it has only one electron orbiting around a
nucleus of charge Z=3. This ion can be described using the wavefunction of hydrogen. The
probability density of finding the electron at a distance r from the nucleus is given by the radial
probability density R=47²². What is the radial probability density of finding an electron in the
and
2s orbital at a distance r=100 pm from the nucleus? 200
a₁-52.9 pm.. [Answer in pm²¹]
2
1
√√327 9₂
——
a
0
-"/200
7
Fig: 1