If we know the capacitance of a given conductor then can we calculate the maximum charge which it can store?

How can we increase the capacitance of a conductor?

Radius of a spherical conductor is 2m , This is kept in dielectric medium of dielectric constant 10^6N//C . Find a. capacitance of the conductor b. maximum charge which can be stored on this conductor.

Radius of a spherical conductor is 2m , This is kept in dielectric medium of dielectric constant 10^6N//C . Find a. capacitance of the conductor b. maximum charge which can be stored on this conductor.

Can we know the atomic radius of an element ?

Is there any conductor which can be given unlimited charge?

Knowing the value of g, how can we calculated the mass and density of Earth?