I believe if it were heavier with more mass, then the sun would pull it in and there would be no mercury. It might also be hotter.
Answer:
a)
m/s
b)
Angular frequency = 
Explanation:
As we know

q is the charge on the electron =
C
B is the magnetic field in Tesla =
T
r is the radius of the circle =
m
mass of the electrons =
Kg
a)
Substituting the given values in above equation, we get -
m/s
b)
Angular frequency =

A. Neutrons.
If it were electrons, it would be an ion.
If it were protons, it wouldn't be the same element.
<h2>It solved by the Hooke's law states F=kx</h2>
answer is
<h2>0.4n/m</h2>