An atom is neutral at first. The atom then emits electromagnetic radiation. Later, some outer electrons are removed from the atom, and it is left with an overall relative charge of +2.
An electron has relative mass 11840\displaystyle \frac{1}{1840}18401 and relative charge -1.
Explain whether the emission of electromagnetic radiation changes the number of electrons in the atom.
Calculate the change in the relative mass of the atom.