Answer:
radius of a
nucleus is 5.784×
meters
Explanation:
Since radius of a nucleus is measured by the formula
R =

Where
is the average radius of a nucleus. This radius varies with the size of nucleons.
In this formula A = number of nucleons = (Number of protons + neutrons)
For element Cd number of nucleons = 112
and
= 1.2×

Now we put these values in the given formula
R =

=

= 5.784×
meters
Therefore, radius of a
nucleus is 5.784×
meters