Respuesta :
					                   A) 1 & 2 
It’s is not 3 because the electrons are found outside of the nucleus; therefore, it only consists of protons and neutrons, and it does has a very dense region.
					                
					             It’s is not 3 because the electrons are found outside of the nucleus; therefore, it only consists of protons and neutrons, and it does has a very dense region.