The mass to charge ratio $(m/e)$ of a cation is $1.5 \times 10^{-8} \ kg/C$. What is the mass of the ion?

Which of the following statements regarding cathode rays is incorrect?

The radius of an atom is of the order of

The radius of a nucleus with mass number $A$ is given by $1.25 \times 10^{-13} \times A^{1/3} \ cm$. If the radius of the atom is $1 \ \mathring{A}$ and the mass number is $64$,calculate the fraction of the volume occupied by the nucleus.

Calculate the ratio of the diameter of an atom to the diameter of its nucleus.

Which of the following particles is represented by the symbol $\alpha$?