What is the similarity between radioactive iodine and stable iodine

According to coulomb's law, how would the electrical force between particles change if the product of their electrical charge increased?

Which theory was contradicted by experiments with the photoelectric effect? light spreads out after it passes through a small opening. as soon as light strikes metal, electrons will be ejected. visible light, regardless of color, will cause the ejection of electrons when striking metal. the kinetic energy of ejected electrons depends on the frequency of light that strikes the metal.

What is the difference between skimming and absorbing methods of the oil removal