¿Por qué se produce el arco iris? ¿En qué orden hemos observado los colores a que se debe? ¿A qué fenómeno ondulatorio corresponde?

The proton has a positive charge while the neutron has no charge they both make up the nucleus of the atom while the elections have a negative charge and surround the nucleus of the atom. the protons and electrons are used to calculate the atom's mass whereas the neutrons don't affect the mass

On edgenuity it is d: watermelons