Is there such thing as a pure mixture?

The image shows a process that releases nuclear energy which statement best identifies the process shown the process must be fusion because energy is released the process must be fusion because of have your nucleus formed a smaller nuclei the process must be fission because a large nucleus breaks into smaller nuclei the process must be fission because neutrons are formed

The name of the ion, s2-, is: sulfurous ion sulfide ion sulfur ion sulfate ion

Which substance is a steroid? cholesterol fatty acid monosaccharide trans fat