Hãy giải giúp mình .

It has to be b i hope this

The answer is d.potassium

The atomic nucleus made up from protons (yellow) and neutrons (blue) and held together by nuclear forces. nuclear forces (also known as nuclear interactions or strong forces) are the forces that act between two or more nucleons. they bind protons and neutrons (“nucleons”) into atomic

Answerit is not a renewable energy source;