Radio waves infrared rays, visible light, ultraviolet rays, X-rays, and gamma rays are all types of electromagnetic radiation. Radio waves have the longest wavelength, and gamma rays have the shortest wavelength.
The following answers:
1. B
2. D
Well, depending on the charge, it could be Cu; if it has a charge of 2+
Http://www.chem4kids.com/files/elem_pertable.html this should help.
