I need your help please :( any body if u know can I get a answer

What are fructose and glucose an example of?

How is the atomic number of a nucleus changed by alpha decay

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.