The probability density of a particle at a distance r from the nucleus is essentially the
A)probability of finding the particle within a small volume about r.
B)probability per unit area of finding the particle within a unit area centered on r.
C)probability per unit length of finding the particle within a unit length of r.
D)probability per unit volume of finding the particle within a small volume about r.

Question

The probability density of a particle at a distance r from the nucleus is essentially the
A)probability of finding the particle within a small volume about r. 
B)probability per unit area of finding the particle within a unit area centered on r. 
C)probability per unit length of finding the particle within a unit length of r. 
D)probability per unit volume of finding the particle within a small volume about r.

Quizplus · Accepted Answer

Probability density is defined as the probability per unit volume. Therefore, option D is the correct choice as it states the probability per unit volume of finding the particle within a small volume about r. Option A and B are not specific enough as they do not include the concept of volume or unit volume. Option C is not relevant to the three-dimensional space in which the particle is located. Option E is not a valid choice as it is a meaningless string of characters.

The Probability Density of a Particle at a Distance R