Question

The probability density is ................... when ${\psi }^2$ has .............values.
1. high, higher
2. high, lower
3. low, higher
4. low, lower

Answer 1

The square of function ${\psi }^2$ at any point is proportional to the probability of finding an electron at that point.
${\psi }^2$ is known as PROBABILITY DENSITY and is always +ve. The region of space in which there is maximum probability of finding an electron (say 90%) is termed as an orbital.