What kind of attraction pulls electrons close to the atomic nucleus?

The electric force pulls electrons close to the atomic nucleus. The protons in the nucleus have a positive charge, and so attract the negatively charged electrons.

The main types of electromagnetic radiation. radio  waves have  the lowest frequencies  and  longest  wavelengths, while gamma  waves have highest frequencies  and shortest wavelengths. the wavelengths vary across the electromagnetic spectrum from about 10–15 m to more than 104 m.hope it !